Proportional Integral Derivative Function Block (Pid) - Samson 3730-5 Configuration Manual

9.4 Proportional Integral Derivative Function Block (PID)

PID FB: ACK_OPTIONS (46)
Storage class S; read/write capability r/w; supported modes ALL
Automatic alarm acknowledgement (PID Function Block)
• [UNDEFINED] · No selection
• HI_HI_ALM · High-high alarm
• HI_ALM · High pre-alarm
• LO_LO_ALM · Low-low alarm
• LO_ALM · Low pre-alarm
• DV_HI_ALM · Limit alarm for upper set point deviation
• DV_LO_ALM · Limit alarm for lower set point deviation
• BLOCK ALM · Block alarm
Note: The alarm is broadcast to the fieldbus host system, but not acknowledged by it.
PID FB: ALARM_HYS (47)
Storage class S; read/write capability r/w; supported modes ALL
Hysteresis for the high and low alarm limits
• 0 to 50 %, [0.5 %]
The alarm conditions remain active as long as the measured value remains within the
hysteresis. The hysteresis value has an effect on the following alarm limits of the PID
Function Block:
HI_HI_LIM; HI_LIM; LO_LO_LIM; LO_LIM; DV_HI_LIM; DV_LO_LIM
Note: The hysteresis value is a percentage of the PV_SCALE range in the PID Function
Block.
PID FB: ALARM_SUM (45)
Storage class S/D; read/write capability r/w; supported modes ALL
Current status of process alarms in the PID Function Block
• HI_HI_ALM · Violation of the high-high alarm
• HI_ALM · Violation of the high pre-alarm
• LO_LO_ALM · Violation of the low-low alarm
• LO_ALM · Violation of the low pre-alarm
• DV_HI_ALM · Violation of the limit alarm for upper set point deviation
• DV_LO_ALM · Violation of the limit alarm for lower set point deviation
• BLOCK ALM · Block alarm
Note: The process alarms can also be deactivated in this parameter group.
KH 8384-5 EN
Parameter lists
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