ZENITH 140
INSTRUCTION MANUAL
92
When a relay is being used for a
pump by time
function, then the
sixth
parameter
will determine the maximum time the pump will be allowed to
run before it is switched off and the next pump takes over.
P215, P225, P235, P245, P255, 265 - Relay Setpoint 3
This parameter determines the
Maximum Time
the pump will be allowed to
run
before being switched “
OFF
” and is entered in minutes.
The pump will switch off either at its “
OFF
” level
Relay Setpoint 2
(
P214,
224, 234, 244, 254
) or its
Maximum Run Time
Relay Setpoint 3
(
P215,
225, 235, 245, 255
), whichever occurs
first
.
P219, P229, P239, P249, P259, 269 - Relay Max.Rate
This parameter will allow a
pump
or
general control relay
to be
switched
at a pre-determined
Rate of change of Level
, irrespective of the “ON” level
setpoint P213, 223, 233, 243, 253, 263. Once a pump or general control relay
has been switched “
ON
” by the pre
-determined
Rate of Change
, it will
remain energised until the level reaches the “
OFF
” level setpoint
P214, 224,
234, 244, 254, 264
.
Max. Rate is entered in Measurement Units (P104) per minute and can be
entered as either positive (increasing level) or negative (decreasing level)
values.
Common Relay parameters
P216, 226, 236, 246, 256, 266
–
Relay Allocation
This parameter determines which input the relay will act on. You can set it to
the transducer (default), or the optional auxiliary (current) input, or an
average of the two. In most cases, this will not need to be changed from the
default.
OPTIONS
DESCRIPTION
1 = Xducer 1 (Default)
Relay acts on Xducer 1 calculated values
2 = Xducer 2
Relay acts on Xducer 2 calculated values
3 = Auxiliary (Optional)
Relay acts on optional current input levels
4 = Average of 1 & 2
Relay acts on the resulting average levels of two
signal inputs.
5 = Differential of 1 & 2
Relay acts on the resulting differential level of two
signal inputs
