S2 dip switch settings, S2 dip switch settings -15 – Rockwell Automation 20L-LL PowerFlex 700L Liquid-to-Liquid Heat Exchanger User Manual

Page 25

Installation

1-15

PowerFlex 700L Liquid-to-Liquid Heat Exchanger User Manual

Publication 20L-UM002A-EN-P

S2 DIP Switch Settings

See the descriptions below and

Table 1.H

for S2 switch settings:

• SW1 (Start Input) — Sets the type of start for the heat exchanger. An

edge-triggered (default) start requires a low-to-high transition of the run
signal to start the heat exchanger. Since the drive will send the run signal,
the edge-triggered start should be used. A level start will cause the heat
exchanger to run when the run signal is present and could be used to start
the heat exchanger automatically on power up.

• SW2 (Cool Down) – Enables/disables a cool down feature to

compensate for thermal soaking following a stop command. When cool
down is enabled (default), the heat exchanger will continue to operate for
an additional 2 minutes following a stop command, decreasing the
coolant temperature. During the cool down period, the STS (Status)
indicator will rapidly flash green. When the cool down period has
expired, the STS (Status) indicator will return to a slower green flash rate
to indicate the heat exchanger is ready to run. The heat exchanger can be
restarted at any time during the cool down period at which time the STS
(Status) indicator will become steady green. The cool down period is
ignored when a fault occurs and the heat exchanger goes directly to the
stopped state.

• SW3 (Ambient Sensor) — Selects the external or on-board ambient

temperature sensor. The external temperature sensor is located on the
bottom/inside of the heat exchanger cabinet. The external (default)
setting should be used with the liquid-to-liquid heat exchanger. The
on-board temperature sensor is mounted on the controller board.

• SW4 (Low Temperature Alarm) — Enables/disables the low temperature

alarm that detects when the ambient temperature or drive loop coolant
temperature is less than or equal to 2°C.

• SW8 (Monitor Type) — Not to be set by the user. Reserved for internal

Rockwell Automation, Inc. use only. This switch setting will not affect
the heat exchanger operation.

Table 1.H S2 DIP Switch Settings

Function

SW8 SW7 SW6 SW5 SW4 SW3 SW2 SW1

Start Input: edge-triggered (default)

—

Not Used

—

level (may start on power up)

—

Cool Down: disabled

—

enabled (default)

—

Ambient Sensor: external (default)

—

on-board

—

Low Temperature Alarm: disabled (default)

—

enabled

—

Monitor Type (temporary): ANSI terminal (default)

—

LCD module

—