SOP Sample Gate and SbyC Operating Instruction for McNary Juvenile Facility

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	Standard Operating Procedure
Subject:	Sample Gate and SbyC Operating Instructions for Lower Monumental Juvenile Facility
Author:	Troy Humphrey
Approved by:	Don Warf

Objective

The Objective of this SOP is to give site personnel a working knowledge of the various functions available to them for entering sample rates and controlling slide gates.

Scope

This SOP is for site personnel responsible for entering sample rates and strictly pertains to McNary Juvenile Facility. The sample gates and slide gates are controlled by a Programmable Logic Controller located near the separator. Commonly referred to as a PLC, this device is accessed by a Panel View 1000 (PV1000) located in the Wet Lab. The PV1000 took the place of a device referred to as a DTAM. The PV1000 acts as a menu driven operator interface to the PLC. All functions of the sample gates are set by PV1000 operator inputs and control switches mounted on the panel located next to B Slide Gate.

Responsibilities

The personnel responsible for entering sample rates are determined by the site biologist.

Procedure

Overview

1. Through out this manual the following formatting shall apply:
   • PAGE TITLE , PARAMETER HEADING or SCREEN NAVIGATION.
     • Used to indicate the current graphic being displayed or what the value below the heading represents or what screen will appear if the box on the screen is touched.
   • ‘PARAMETER’
     • A user settable value such as ‘SAMPLE PERCENT’ or a PLC generated value such as ‘TIME REMAINING’.
   • Switch or SWITCH SETTING.
     • User settable switches that effect gate and sample functionality such as: The A Gate is set to OFF .
2. The PV1000 is a touch screen operator interface. The user can simply touch certain areas on the screen to perform specific tasks. The screens have different colored boxes and text that will help the user identify their functionality.
   • Yellow text is values produce by the PLC and are dependent on parameters entered by the user.
   • Dark blue boxes with white text are screen push buttons that allow the user to navigate to different screens or to open data entry screens.
     • Once a data entry screen is open the numeric pad to the right is used to enter in values.
3. Touch anywhere on the screen if the screen is black due to the screen saver being on.
   • The main menu screen will appear and look similar to the screen displayed below.
   • If a screen other than the one below appears press the RETURN TO MAIN box located in the lower section of the screen.

• In the left hand column A Sample Gate’s times are displayed. In the right hand column B Sample Gate’s times are displayed.
• The current ‘SAMPLE PERCENT’ for the A or B Sample Gate will be displayed in their respective column in the box below the heading of SAMPLE PERCENT.
• The current ‘OPENINGS PER HOUR’ for the A or B Sample Gate will be displayed in their respective column in the box below the heading of OPENINGS PER HOUR.
• If the A or B Sample Gate is in sample, the ‘SAMPLE TIME REMAINING’ for the A or B Sample Gate will be displayed in their respective column in the box below the heading of SAMPLE REMAINING. The ‘TIME TO NEXT SAMPLE’ will be display in the box below the heading of TIME TO NEXT.
• The state of the Sample Mode switch for the A or B Sample Gate will be displayed in their respective column in the box below the heading of OPERATIONAL MODE at the bottom of the screen.

Changing the Sample Percent

1. To set the ‘SAMPLE PERCENT’ for A Sample Gate, touch the box below the heading SAMPLE PERCENT in the SAMPLE A column.
2. A display box will appear over the screen with a message stating ‘Enter Value: ( 0.001 to 99.999 ). Use the numeric keypad to enter any percent between 00.001% and 99.999% and press the enter button. This will enter the new ‘SAMPLE PERCENT’ and return you to the MAIN screen.
   • If you decide not to enter a new ‘SAMPLE PERCENT’ press the lower left arrow of the numeric keypad, this arrow will act as a backspace.
3. To set the ‘SAMPLE PERCENT’ for B Sample Gate, touch the box below the heading SAMPLE PERCENT in the SAMPLE B column.
4. A display box will appear over the screen with a message stating ‘Enter Value: ( 0.001 to 99.999 ). Use the numeric keypad to enter any percent between 00.001% and 99.999% and press the enter button. This will enter the new ‘SAMPLE PERCENT’ and return you to the MAIN screen.
   • If you decide not to enter a new ‘SAMPLE PERCENT’ press the lower left arrow of the numeric keypad, this arrow will act as a backspace.
5. Once the new ‘SAMPLE PERCENT’ is entered the new sample cycle will start. The cycle will start with the gate in the closed (not sampling) part of the cycle.
6. It should be noted that the PLC looks for a change in the ‘SAMPLE PERCENT’ before it re-calculates the time so it is important to enter in a ‘SAMPLE PERCENT’ value that is different than what is currently being displayed.
   • An example of this is when the user wishes to sync the sample with the top of the hour but not change the Sample Rate.
   • To do this the user will have to enter in a ‘SAMPLE PERCENT’ that is different than what is currently being used. Do this just prior to the top of the hour. Then at the top of the hour the user will enter in the original ‘SAMPLE PERCENT’.

Changing the Openings Per Hour

1. To set the ‘OPENINGS PER HOUR‘ for A Sample Gate, touch the box below the heading OPENINGS PER HOUR in the SAMPLE A column.
2. A display box will appear over the screen with a message stating ‘Enter Value: (1 to 12). Use the numeric keypad to enter any ‘OPENINGS PER HOUR’ between 1 and 12 and press the enter button. This will enter the new ‘OPENINGS PER HOUR’ and return you to the MAIN screen.
   • If you decide not to enter a new ‘OPENINGS PER HOUR’ press the lower left arrow of the numeric keypad, this arrow will act as a backspace.
3. To set the ‘OPENINGS PER HOUR’ for B Sample Gate, touch the box below the heading OPENINGS PER HOUR in the SAMPLE B column.
4. A display box will appear over the screen with a message stating ‘Enter Value: (1 to 12). Use the numeric keypad to enter any ‘OPENINGS PER HOUR’ between 1 and 12 and press the enter button. This will enter the new ‘OPENINGS PER HOUR’ and return you to the MAIN screen.
   • If you decide not to enter a new ‘OPENINGS PER HOUR’ press the lower left arrow of the numeric keypad, this arrow will act as a backspace.
5. Once the ‘OPENINGS PER HOUR’ is entered the new sample cycle will start. The cycle will start with the gate in the closed (not sampling) part of the cycle.
6. It should be noted that the PLC looks for a change in the ‘OPENINGS PER HOUR’ before it re-calculates the time so it is important to enter in a ‘OPENINGS PER HOUR’ value that is different than what is currently being displayed.
   • An example of this is when the user wishes to sync the sample with the top of the hour but not change the Sample Rate.
   • To do this the user will have to enter in a ‘OPENINGS PER HOUR’ that is different than what is currently being used. Do this just prior to the top of the hour. Then at the top of the hour the user will enter in the original ‘OPENINGS PER HOUR’.

Changing the Counters

From the MAIN menu touch the box with the text COUNTERS and the following screen will appear

1. In the left box below the heading GATE C COUNT will be displayed the number of times C Slide Gate has opened or closed (depending on it’s Op Mode switch setting).
2. In the right box below the heading GATE D COUNT will be displayed the number of times D Slide Gate has opened or closed (depending on it’s Op Mode switch setting).
3. The counts represent a percentage of fish diverted to the raceways or from the raceways.
4. It should be noted that when the TEST C or TEST D button is pushed this will increment the respective counter. If extensive testing is to be done on a gate the count should be recorded prior to testing. When testing of X Gate is done the original count should be re-entered.
5. To reset the counters or re-enter a count (when testing is done) touch the box containing the ‘COUNTS’ you wish to reset or re-enter.
6. A display box will appear over the screen with a message stating ‘Enter Value: ( 0 to 10000 ). Use the numeric key pad to enter any percent between 0 and 10000 and press the enter button. This will enter the new ‘COUNTS’ and return you to the COUNTERS screen.
7. Touch the box with the text RETURN TO MAIN SCREEN to return to the MAIN menu.

Gate Control Switches

The panel located to the right of the PLC enclosure has six switches mounted on it.

1. Mode Switches
   • The top left switch is the A Sample Mode switch for A Sample Gate and the top right switch is the B Sample Mode switch for the B Sample Gate. Each switch has three mode positions.
     • The first position from left to right is labeled OFF for BYPASS. With the switch in this position there will be no sampling.
     • The second or middle position is labeled AUTO for NORMAL OPERATION. With the switch in this position, sampling will occur based on the ‘SAMPLE PERCENT’ and ‘OPENINGS PER HOUR’ entered.
     • The third position is labeled ON for 100% sample. With the switch in this position the sample gate will stay in the sample position.
2. A & B Slide Gate Switches
   • The middle left switch is the A Gate switch for A Slide Gate and the middle right switch is the B Gate switch for B Sample Gate. Each switch has two positions.
     • The left position is labeled OFF. With the switch in this position the Slide Gate will not operate.
     • The right position is labeled ON. With the switch in this position the Slide Gate will open under the following conditions.
       • When PLC receives a diversion request from the platform located in the PIT tag room or if the TEST X button is pushed the gate will open AND
         • The Divert During Sample switch is turned OFF and there is not a active sample taking place OR
         • The Divert During Sample switch is turned ON.
3. Divert During Sample
   • The lower left switch is the Divert During Sample switch for A Sample Gate and the lower right switch is the Divert During Sample switch for B Sample Gate. With this switch ON, PIT Tagged fish will be diverted during the sample. This will occur at any sample rate but not during BYPASS mode.

The panel located near the C Slide Gate has 4 switches mounted on it

1. C & D Slide Gate Switches
   • The top left switch is the C Gate switch for C Slide Gate and the top right switch is the D Gate switch for the D Slide Gate. Each switch has two positions.
     • The left position is labeled OFF. With the switch in this position the Slide Gate will not operate.
     • The right position is labeled ON. With the switch in this position the Slide Gate will operate in the following manner under the following conditions.
       • When PLC receives a diversion request from the platform located in the PIT tag room or if the TEST X button is pushed the gate will open or close depending on the position of the Op Mode switch.
2. Op Mode Switches
   • The lower left switch is the Op Mode switch for C Slide Gate and the lower right switch is the Op Mode switch for D Slide Gate. Each switch has two positions.
     • The left position is labeled FWD. With the switch in this position the slide gate remains closed until a diversion request is received from the platform located in the PIT tag room or the TEST X button is pushed.
     • The right position is labeled REV. With the switch in this position the slide gate remains in the open position until a diversion request is received from the platform located in the PIT tag room or the TEST X button is pushed.

Located near each Slide Gate is a TEST X button, this is a momentary push button that allows you to test the action of the Slide Gate. These test buttons work under the conditions previously outlined in this procedure.

Frequenlty Asked Questions

Q: Can I damage the system?
A: No. No operator inputs can damage the system.

Q: Can I use the gate test switches ( TEST X )at any time?
A: No. The test switches will not work during an active sample when the Divert During Sample switch is set to OFF.

Q: Can I enter an incorrect value?
A: Yes. Caution should be used when determining sample gate open time. An example would be entering 12 openings per hour with a 00.1 percent sample rate. Point one percent of an hour would be 3.6 seconds. When divided by 12 gate openings per hour the open time per opening would be .3 second. This is not enough time to fully open the gate. The same consideration should be used when using a 99.9 sample rate.

Q: Can I enter a value out of range?
A: No, the PV600 will give you a ‘value out of range’ error.

Q: When the Sample Mode is set to 100%, will PIT tagged fish be diverted from the sample?
A: No. They will only be diverted if the Divert During Sample switch is ON.

Q: With the Sample Mode switch set to AUTO (Normal Operation) and the Divert During Sample switch set to ON, will PIT tagged fish be diverted from the sample.
A: Yes, With the Divert During Sample switch set to ON, PIT tagged fish will be diverted from the sample.

Q: Can the sample be shut off?
A: Yes, when Sample Mode is set to OFF(Bypass) the sample will be shut off.

Q: How can I synchronize a new sample rate with the top of the hour?
A: When a new sample rate or new number of openings per hour is entered the new cycle starts exactly when the enter button is pushed. It should be noted that the value you are changing to synchronize with the top of the hour must be a new value. If you don’t want to change your ‘SAMPLE PERCENT’ or ‘OPENINGS PER HOUR’ but wish to synchronize at the top of the hour you must enter a different ‘SAMPLE PERCENT’ or ‘OPENINGS PER HOUR’ just prior to the top of the hour. This will cause the PLC to see a change in sample rate and re-calculate the sample times. At the top of the hour re-enter the ‘SAMPLE PERCENT’ or ‘OPENINGS PER HOUR’ you wish to run at.

Q: What will happen if a power outage occurs? Will I lose my settings?
A: No. All sample settings are stored in non-volatile memory.

References