Rockwell Automation 900-TC32 Digital Temperature Controllers, Series B - Manual (Page 241)

Publication 900-UM007D-EN-E - January 2011
Parameter Functions & Definitions 5-13
Function: This parameter measures the heater current from two CT inputs
used for detecting heater alarm conditions in 3-phase heaters and displays the
value on the controller.
• Heater burnout, heater short, and heater overcurrent conditions are not
detected if the Control Output (heating) ON time is 100 ms or less.
• ffff is displayed when 55.0 A is exceeded.
• If a heater burnout detection 2 or heater overcurrent detection 2 alarm
is output, the HA indicator will light and the No. 1 display for the heater
current 2 value monitor will flash.
Related Parameters
Refer to the Advanced Setting function group:
• Heater Burnout Detection 1, Heater Burnout Detection 2 (page 5-30)
• HB ON/OFF (page 5-30)
• Heater overcurrent detection 1, Heater overcurrent detection 2 (page
5-30)
• Heater overcurrent use (page 5-30)
• Error Displays
ct2
: (Chapter 6, page 6-5)
Leakage Current 1 Monitor
(900-TC8 &900-TC16)
Conditions of Use: Heater Burnout (HBA), Heater Short (HSA), and Heater
Overcurrent (HOA) alarms must be supported. Alarm 1 must be assigned and
CT Number 1 wired to the controller. The HS Alarm Use parameter must be
set to ON.
Function: This parameter measures the heater current from the Number 1
CT input used for detecting a short-circuit condition in single-phase heaters.
The heater current is measured and the value is displayed.
Table 5.N
Monitoring Range Units
0.0...55.0 A (Amps)
lcr1