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Parameter description
nent RATE, the manipulated variable is calculated depending on the rate of change of the
system deviation.
An output value OUT is formed from the calculated manipulated variable corresponding to
the OUT_SCALE, OUT_HI_LIM and OUT_LO_LIM parameters. This output value can be
passed on to a downstream connected Function Block.
The status of the output value OUT can be influenced by the STATUS_OPTS parameter de-
pending on the status of the input variable of the PID Block. This allows, for example, the
fault state of a downstream connected output block to be activated.
The BYPASS parameter allows the internal set point to be directly transferred to the correc-
tion value.
Feedforward is possible over the FF_VAL input variable. TRK_IN_D and TRK_VAL allow the
output value to be directly tracked.
Set point
limits
SP
SP_HI_LIM
SP_LO_LIM
Fig. 15 ⋅ PID Function Block (PID controller)
66
EB 8383-1 EN
Set point
PV scaling
ramps
SP
PV_SCALE
Sp_RATE_DN
Sp_RATE_UP
Filter
Scaling
PV
IN
PV_TIME
PV_SCALE
ON
PID
TRK_IN_D
OFF
algorithm
Bypass
GAIN
RATE
+
RESET
FF_GAIN
Scaling
Scaling
FF_SCALE
TRK_SCALE
FF_VAL
TRK_VAL
Feedforward
Tracking
Output
limits
Scaling
OUT_HI_LIM
OUT_SCALE
–
OUT_LO_LIM
OUT
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