Emotron VFX 2.0 Instruction Manual page 105

state margin the test failed and normal PID operation con-
tinues, see example.
389 PID Stdy Mar
Stp
A
Default: 0
Range: 0–10000 in process unit
Communication information
Modbus Instance no/DeviceNet no:
Profibus slot/index
Fieldbus format
Modbus format
[711] Process Value
[389]
[310] Process Ref
[389]
[387]
[712] Speed
Fig. 78 Steady state test
Emotron AB 01-4429-01r2
0
43374
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Long, 1=0.01 s
EInt
[388]
Start steady
state test
Normal PID
Steady state
test
[341] Min Speed
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
.
Stop steady
state test
[386] PID<Min Spd
time
Normal PID
Stop/Sleep
Functional Description 97