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PD6210 Analog Input Batch Controller Instruction Manual
37
Rate Relay Sampling Operation
When the signal crosses the set point, the relay trips and the sample time starts. After the sample time
has elapsed, the relay resets. The cycle repeats every time the set point is crossed, going up for high
alarms and going down for low alarms.
The sample time can be programmed between 0.1 and 600.0 seconds.
Total Relay Sampling Operation
When the batch total reaches the set point, the relay trips and the sample time starts. After the sample
time has elapsed, the relay resets. The cycle repeats every time the set point value is added to the batch
total.
Signal Loss or Loop Break Relay Operation
The following graph shows the loop break operation for a high alarm relay.
When the controller detects a break in the 4-20 mA
loop, the relay will go to one of the following selected
actions:
1. Turn on (Go to alarm condition)
2. Turn off (Go to non-alarm condition)
3. Ignore (Process as a low signal condition)
