50
Note: The IN USE hours accumulator value will roll over to zero when the upper limit of the accu-
mulator has been exceeded. This limit is 4,294,967,295 hours for V3.00, and 999,999,999 hours
for V3.11 and up.
4.3.5 TIME SINCE LAST RESET
Purpose: This feature indicates the total hours of controller use since the last reset. It may be
useful to log the amount of time a particular controller has been in service since the last time the
controller’s power was cycled for troubleshooting purposes.
Procedure: The
TIME SINCE LAST RESET hours accumulator can only be reset by cycling the con-
troller’s power.
Note: The
TIME SINCE LAST RESET will roll over to zero when the upper limit of 65,535 hours has
been exceeded.
4.3.6 PEAK LOAD CURRENT (V3.11 AND UP)
Note: The
PEAK LOAD CURRENT is not displayed on the optional 920 Operator Console.
Purpose: This feature indicates the highest instantaneous load current measured since the last
time the
PEAK LOAD CURRENT was reset. This value is written to the controller’s nonvolatile mem-
ory once every 24 hours or whenever any maintenance data is reset by the user.
Procedure: The
PEAK LOAD CURRENT may only be reset to zero using a communicating device.
4.3.7 PEAK GROUND-FAULT CURRENT (V3.11 AND UP)
Note: The
PEAK GROUND-FAULT CURRENT is not displayed on the optional 920 Operator Console.
Purpose: This feature indicates the highest instantaneous ground-fault current measured since
the last time the
PEAK GROUND-FAULT CURRENT was reset. This current value is written to the
controller’s nonvolatile memory once every 24 hours or whenever any maintenance data is reset
by the user.
Procedure: The
PEAK LOAD CURRENT may only be reset to zero using a communicating device.
4.3.8 EXTERNAL INPUT STATUS (V3.11 AND UP)
Note: The
EXTERNAL INPUT STATUS is not displayed on the optional 920 Operator Console.
Purpose: This feature indicates the actual status of the external input regardless of the control-
ler’s configuration. This can assist the operator who wishes to use the controller’s external input
to monitor the status of an external dry contact and pass this on to another device.
Procedure: The
EXTERNAL INPUT STATUS may only be viewed using a MODBUS™-capable soft-
ware package.
Section 5 Control Modes
5.1 Introduction
There are several types of control modes in the controller. Some of these modes require further
explanation in order to fully understand and implement their operation.
This section describes the control modes available in the
HTC and how to set their associated
parameters.
5.2 Switch Control Modes
There are four SWITCH CONTROL modes associated with the HTC. The following is an explanation
of their implementation in the controller and the differences between them.
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