Watlow CLS200 - Figure 5.3 - Application Using Process Variable Retransmit; Table 5.1 - Application Example: Setting up Process Variable Retransmit

CLS200 Series User’s Guide
Chapter 5: Enhanced Features
101
CLS200
Furnace
Power
Controller
To Data
Logger
Loop 1 PID Output
Loop 2 PID Output
Heater
Loop 1
Input
Process
Variable
Serial
DAC
Figure 5.3 — Application Using Process Variable Retransmit
To set up this application, you would do the following:
1. First, set up the standard control loop parameters according to the furnace application, in this
case on loop 1.
2. Select another unused PID output for retransmitting the thermocouple value (for example, loop
2 heat output).
3. Change the display to loop 2, and then enter the three-key sequence (ENTER, then ALARM
ACK, then CHNG SP) and go to the first screen in Table 5.1.
4. Follow the steps in Table 5.1 to configure the process variable retransmit option.
5. After following the steps in Table 5.1, press BACK several times until the normal loop display
appears. The controller will now produce an output on loop 2 which is linear and proportional
to the loop 1 process variable.
Table 5.1 — Application Example: Setting Up Process Variable Retransmit
DISPLAY USER INPUT
ALARM
SETUP LOOP 02
PV RETRANSMIT
Press YES.
ALARM
02 HEAT OUTPUT
RETRANS PV? 01
Enter 01 for loop 1 process variable. Press ENTER.