Rockwell Automation 900-TC32 Digital Temperature Controllers, Series B - Manual (Page 328)

Publication 900-UM007D-EN-E - January 2011
5-100 Parameter Functions & Definitions
Function: When you configure this parameter to ON, the HS alarm is held
until any of the following conditions is satisfied:
• Heater overcurrent detection is set to 50.0 A.
• The controller power is cycled.
• The latch is cancelled by the PF Key. (900-TC8) PF Setting = LAT:
Alarm Latch Cancel
• The latch is cancelled by an event input. (Event Input Assignment 1 and
2 = LAT: Alarm Latch Cancel)
Note: The output is turned OFF when switching to the Initial Setting function
group, Communications function group, Advanced Setting function
group, or calibration function group.
Related Parameters
• Heater overcurrent detection 1, Heater overcurrent detection 2
(Adjustment function group, page 5-26)
• Heater overcurrent use (Advanced Setting function group, page 5-99)
Heater overcurrent hysteresis (Advanced Setting function group, page
5-100)
• Event input assignment 1 and 2 (Initial Setting function group, page
5-66)
• HB ON/OFF: page 5-74, PF setting (Advanced Setting function group,
page 5-101)
Heater Overcurrent Hysteresis
(900-TC8, 900-TC16)
Conditions of Use: Heater burnout, HS alarms, and heater overcurrent
detection must be supported, and alarm 1 must be assigned. The Heater
Overcurrent Use parameter must be set to ON, and the Heater Overcurrent
Latch parameter must be set to OFF.
Function: This parameter allows you to configure the hysteresis (allowed
deviation from setting) for heater overcurrent detection.
Table 5.DV
Selections Default
on: Enabled, off: Disabled off
Table 5.DW
Configurable Range Units Default
0.1 to 50.0 A 0.1
och