Xylem IM255 AQUAVAR Intelligent Pump Controller - Manual (Page 91)

NOTE: If Constant Slave Mode is enabled the relays are used to control the fixed speed
pumps. Changing the relay function with Constant Slave Mode enabled can cause the
Constant Slave Controller to malfunction.
Relay outputs
To configure the relay set the relay function and the relay on delay. The relay function
configures when the relay will change state. For example, when set to ‘No Alarm’, the relay
will change state from the inactive to the active state when no alarms exist in the system. In
the inactive state COM = NC and in the active state COM = NO. The relay on delay time is
the time between the relay function trigger and when the relay changes state. For
example, if the relay function is set to ‘Running’ and the delay time is set to 10 seconds,
the relay will change state 10 seconds after the pump starts running. Relay 1 function is
programmed as array parameter 5–40.0. Relay 2 function is programmed as part of array
parameter 5–40.1. Relay 1 On Delay is programmed as part of array parameter 5–41.0.
Relay 2 On Delay is programmed as part of array parameter 5-41.1.
The Relay Function screen is an array parameter screen. Refer to Programming the
Controller section for details on how to program an array parameter screen.
The relay function options are shown in the table below.
Option Function
[0]* No operation
[1] Control ready
[2] Drive ready
[3] Drive rdy/rem ctrl
[4] Standby / no warning
[5]* Running (Relay 2 Default)
[6] Running / no warning
[8] Run on ref/no warn
[9] Alarm
[10] Alarm or warning
[11] At torque limit
[12] Out of current range
[13] Below current, low
[14] Above current, high
[15] Out of speed range
[16] Below speed, low
Operation
Aquavar ® Intelligent Pump Controller INSTRUCTION MANUAL 89
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