ControlMaster CM30 and CM50
Universal process controllers,
1
/4 and
1
/2 DIN 7 Advanced Level
44 IM/CM/ED–EN Rev. B
…Control / …Loop 1 (2) Control
Loop 1 (2) Output Used to set the output limits, tracking rates, slew rates and output action on power failure or
process variable failure.
Limits When used with split output the limits restrict the PID algorithm output (see page 20) before
the split output range values are calculated.
Limit Action Selects when the output limits should be applied (Off, Auto + Manual, Auto Only).
Low Limit Set minimum controller output in %.
High Limit Set maximum controller output in %.
Failure Actions
Power Recovery Used to select the default power failure mode required following a power interruption or
failure.
Last Mode
The last Power Recovery mode selected.
Man – Last
Manual control mode using the last output before power failure.
Man – 0 %
Manual control mode with output set to 0 %.
Man – 100 %
Manual control mode with output set to 100 %.
Man – Default
Manual control mode with output set to default value.
Auto Mode
Auto control mode with integral term reset.
Auto – Last
Auto control mode with integral term restored to its last value before the power failure.
Timed – Last
If the power outage is < recovery time, the control mode before power down is selected.
If the power outage is > recovery time, Manual control mode (Man – Last) is selected using
the last output before the power failure.
Timed – Default
If the power outage is < recovery time, the control mode before power down is selected.
If the power outage is > recovery time, Manual control mode (Man – Last) is selected using
the default output value.
Recovery Time
Set time in seconds for use with Timed power recovery.
PV Fail Action Determines the controller output when the process variable input fails.
No Action
No action is taken if the process variable input fails.
Man – Hold O/P
Puts the controller into Manual control mode and holds the output at its value immediately
prior to the PV failure.
Man – Default O/P
Puts the controller into Manual control mode and sets the output to the default output value.
Default Output This parameter is used in conjunction with Power Recovery (see page 44) and PV Fail Action
settings (see above). For split output this value refers to the PID algorithm (see page 20)
before the split range values are calculated.
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