[`alr]
Communications
[Cdog]
Watchdog Alarm
Alarm will occur if no communications is detected for time specified in
[`Out]
Watch-
dog timeout. Not available unless Serial Communications is installed.
[`alr]
Line Over Voltage
[``OU]
Alarm
Alarm will occur if the line voltage is greater than the maximum rated voltage of the de-
vice. Caused by line voltage being over line voltage 10%.
Heater Open = 0x0001
Heater Tolerance = 0x0002
Over Temperature = 0x0004
Line Loss = 0x0008
Phase Balance = 0x0010
Load Balance = 0x0020
Frequency = 0x0040
Voltage Compensation = 0x0080
Over Voltage = 0x0100
Comms Watchdog = 0x0200
Any alarms that are active will be represented in bi-
nary. As an example, if a Comms Watchdog and a
Phase Balance Alarm exists, Modbus register 180 will
contain 0x0210.
Comms Watchdog = 0000001000000000
Phase Balance = 0000000000010000
[`alr]
Alarms
Troubleshooting Alarms and Errors
Alarm / Error
Condition For Alarm or Error To Occur
[`alr]
Heater Open
[Open]
Alarm
Alarm will occur when
≤
2amps is detected (as measured by the Power Series) for
>
20% re-
quested power.
[`alr]
Heater Tolerance
[`tol]
Alarm
Alarm will occur when the load current detected is less than the value set in the Setup
Page > Options Menu >
[toL_]
or is greater than the value set in
[toL–]
. This will
accomplish both the overcurrent condition alarm and the heater failure low current alarm.
This will only occur if requested power is greater than 20 percent.
[`alr]
Heat Sink Over
[``Ot]
Temperature
Alarm
Alarm will occur when the heat sink temperature is greater than the value set in the
Setup Page >
[`ALr]
>
[`ALÇ]
.
[`alr]
Phase Balance
[pbal]
Alarm
Alarm will occur when measured voltage of one phase of a 3 phase, 3-leg system is > 20%
different from any other.
[`alr]
Load Balance
[lbal]
Alarm
Alarm will occur when the load current is determined to be out of balance. User specified in
the Setup Page >
[`ALr]
>
[ldif]
. Default to 100%.
[`alr]
Frequency Out of
[freq]
Tolerance Alarm
Alarm will occur if frequency is not within 47 to 63 Hz.
[`alr]
Line Compensation
[``UC]
Alarm
Alarm will occur if the voltage compensation routines cannot compensate for input line
voltage changes; occurs for requested power from 5% to 95%,
[Urtb]
,
[ph2t]
control if
[``UC]
=
[``ON]
.
[`alr]
Line Loss Alarm
[line]
Alarm will occur when the zero cross signal does not occur. Caused by loss of line polarity,
zero cross or voltage level signal. Also caused by zero cross timing out of tolerance. This
alarm will also occur when line voltage is < one-half baseline voltage.
A.4
I
Watlow Power Series
Appendix
Summary of Contents for PC1X-N20
Page 4: ...ii Watlow Power Series Table of Contents...
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