Use BKCAL_OUT With IN_1 — Normally, BKCAL_OUT is associated with initialization of an upstream block that is providing CAS_IN. If this option is set, then BKCAL_OUT is associated with the upstream block providing IN_1. This option is used with the Ratio and Bias/Gain block to determine the value and status that must be provided in BKCAL_OUT for proper initialization and handshaking.
No OUT Limits in Manual — Do not apply OUT_HI_LIM or OUT_LO_LIM when target and actual modes are Man. OUT will still be limited to no more than 10% outside the range of OUT_SCALE.
Obey SP Limits if Cas or RCas — Normally a cascaded setpoint is not restricted to the downstream block setpoint limits except when entered by a human interface device. However, if this option is selected, the cascaded setpoint is restricted to the setpoint absolute limits in the Cas and RCas modes. If a downstream block SP limit is reached and the cascade loop is not configured for Dynamic Reset Limiting, integral action is suspended on the upstream block when the error is driving the upstream block into the limit.
Act on IR — Used to back calculate for bumpless transfer.
In the Bias/Gain function block as well as the Ratio function block, if this option is true, when the block is in a non-automatic mode or transitions to an automatic mode, the SP will be back calculated for purposes of bumpless transfer. The back calculated SP will be limited to the range defined by the SP limits. Any difference between the value required for bumpless transfer will be added to OUT and then ramped out over BAL_TIME.
In the PID block, if this option is true and the STRUCTURE parameter is set to PD, then, when the block transitions to an automatic mode from a non-automatic mode the BIAS is back calculated for bumpless transfer.
Use PV for BKCAL_OUT — Normally, BKCAL_OUT contains the value of the working setpoint (SP_WRK). When necessary, use the process variable (PV) instead by turning on the Use PV for BKCAL_OUT control option. Note that even when this control option is turned on, it is enforced only when the block is in Cas mode. When the block is in a non-Cas mode, SP_WRK is used for BKCAL_OUT.
Track in Manual — Enables external tracking for target mode of MAN when Track Enable option has been selected. If Track In Manual is not selected then external tracking is prevented with a target mode of MAN, and, switching to a target mode of MAN will stop external tracking if external tracking had previously been initiated.
Track Enable — Enables external tracking function. If Track Enable option is selected, then, when TRK_IN_D is true, and, the target mode is not MAN or the Track In Manual option is selected, the block is placed in LO, the block output is set to the value of TRK_VAL.
Direct Acting — Defines the relationship between a change in PV and the corresponding change in output. When Direct Acting is enabled (True), an increase in PV results in an increase in the output.
SP Track Retained Target — Permits the setpoint to track the RCas or Cas parameter based on the retained target mode when the actual mode of the block is IMan, LO, Man, or ROut. SP Track Retained Target has precedence over the other SP-PV track options in the selection of the value to track when the actual mode is IMan, LO, Man, or ROut.
SP-PV Track in LO or IMan — Permits the SP to track the PV when the actual mode of the block is LO or IMan. SP-PV Track in Man takes precedence over SP-PV Track in LO or IMan. SP-PV Track in Man must be enabled in order for SP-PV Track in LO or IMan to track when Target mode is MAN.
SP-PV Track in ROut — Permits the setpoint to track the process variable when the actual mode of the block is ROut.
SP-PV Track in Man — Permits the SP to track the PV when the target mode of the block is Man.
Bypass Enable — This parameter, if true, allows BYPASS to be set. Some control algorithm applications cannot provide closed loop control if bypassed.