Emotron AB 01-4429-01r2 Functional Description 97
state margin the test failed and normal PID operation con-
tinues, see example.
Communication information
Example: The PID Steady Test starts when the process value
[711] is within the margin and Steady State Test Wait Delay
has expired. The PID output will decrease speed with a step
value which corresponds to the margin as long as the Process
value [711] stays within steady state margin. When Min
Speed [341] is reached the steady state test was successful
and stop/sleep is commanded if PID sleep function
[386]and [387] is activated. If the Process value [711] goes
outside the set steady state margins then the test
failed and normal PID operation will continue, see Fig. 78
.
Fig. 78 Steady state test
Default: 0
Range: 0–10000 in process unit
Modbus Instance no/DeviceNet no: 43374
Profibus slot/index 170/23
Fieldbus format Long, 1=0.01 s
Modbus format EInt
[711] Process Value
[310] Process Ref
[387]
[712] Speed
[388]
Stop/Sleep
[389]
[389]
[341] Min Speed
[386] PID<Min Spd
Normal PID
Stop steady
Start steady
Steady state
Normal PID
test
state test
state test
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