This table shows the effect of the output frequency of changing proportional gain
and bias with the following settings:
ctrI SPAN = 20, A1.dc = 1.0, A1.IG = 0.000
A1.SP A1.PG A1.bS Effect on relay operation
70 1.000 0.0 Reading of 50 or below - relay pulses at maximum frequency.
Reading of 50 to 70 - relay pulses with frequency decreasing as
value approaches 70.
Reading 70 or above - relay permanently off.
70 1.000 100.0 Reading of 70 or below - relay pulses at maximum frequency.
Reading of 70 to 90 - relay pulses with frequency decreasing as
value approaches 90.
Reading 90 or above - relay permanently off.
70 1.000 50.0 Reading of 60 or below - relay pulses at maximum frequency.
Reading of 60 to 80 - relay pulses with frequency decreasing as
value approaches 80. (period increased by 50% at 70 compared
to minimum period e.g. if minimum period is 4 seconds the period
at 70 will be 6 seconds)
Reading 80 or above - relay permanently off.
70 0.500 50.0 Reading 50 or below - relay pulses at maximum frequency.
Reading 50 to 90 - relay pulses with frequency decreasing as
value approaches 90. (period increased by 50% at 70 compared
to minimum period e.g. if minimum period is 4 seconds the period
at 70 will be 6 seconds)
Reading 90 or above - relay permanently off.
70 -1.000 50.0 Reading of 60 or below - relay permanently off.
Reading of 60 to 80 - relay pulses with frequency decreasing as
value approaches 80. (period increased by 50% at 70 compared
to minimum period e.g. if minimum period is 4 seconds the period
at 70 will be 6 seconds)
Reading 80 or above - relay pulses at maximum frequency.
7.12 PI relay on duration
Display: Ax.dr
Range: 0.0 to 25.0
Default Value: 1.0
Displays and sets the control relay on duration from 0.0 to 25.0 seconds. If set to 0.0 the relay
will be disabled. The duration should be long enough to ensure that the device being controlled
receives an acceptable on pulse.
7.13 Setting up the PI frequency controller
1. Set the Ax OPEr function to AxFr.
2. Set the control setpoint Ax.SP to the required setting.
PM4IVMAN-2.4-0 53 of 56
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