Page 83
Control
When P210, 220, 230, 240, 250 = 3 (Control)
When a relay is being set up as a control relay, the second parameter that
will be displayed in the menu determines its function.
P211, P221, P231, P241, P251, Relay Function,
This function allows the relay to be assigned to specific control functions
(other than pumps and alarms) several of these functions work in relation to
time.
This can be used to activate devices based on elapsed time or running
cycles, such as a timed rake control to keep a ram lubricated if idle for long
periods, or penstock/gate operation.
Relay will energise “ON” after the Cycle time that is
set in Relay Setpoint 2 (P214, 224, 234, 244, 254).
And turns “OFF”, de-energises, after the On Time
Period that is set in Relay Setpoint 1 (P213, 223,
233, 243, 253)
Step Time Control allows relays to be used to control
a device, such as a motorised valve or gate, in order to
maintain the level within two predetermined points.
Relays will energise “ON” when Step Time condition
is in effect and de-energises “OFF” when Step Time
goes off. One relay will be required to control an
increase in level, (‘open’ the device) and a second
relay is required to control a decrease in level, (‘close’
the device). Alarm ID (P212, 222, 232, 242, 252) is
used to assign the relay to control either the open or
close condition. Step Time Control relay requires
three setpoints. The first set point (P213, 223, 233,
243, 253) determines the level, at which the relay is to
be activated, (N.B. level setpoint for open relay,
increase the level, must be lower than the setpoint
for the close relay, decrease the level). The relay will
energise “ON” after the Limit time that is set in
Relay Setpoint 3 (P215, 225, 235, 245, 255). And
turns “OFF”, de-energises, after the Drive Period
that is set in Relay Setpoint 2 (P214, 224, 234, 244,
254).
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