Rockwell Automation 900-TC32 Digital Temperature Controllers, Series B - Manual (Page 302)

Publication 900-UM007D-EN-E - January 2011
5-74 Parameter Functions & Definitions
HB ON/OFF (900-TC8, 900-TC16)
Conditions of Use: The controller hardware that supports the Heater
Burnout (HB), Heater Short (HS), and Heater Overcurrent (HO), Alarm 1
must be configured and the appropriate number of Current Transformers
(CT) to support the application are connected to the controller.
Function: This parameter allows you to configure the operation of the Heater
Burnout Alarm (HBA).
Heater Burnout Latch (900-TC8, 900-TC16)
Conditions of Use: The HB ON/OFF parameter must be configured to ON
and the controller hardware must support the Heater Burnout (HB), Heater
Short (HS), and heater overcurrent detection. Alarm 1 must also be configured
to ON. The appropriate number of Current Transformers (CT) to support the
application must be connected to the controller.
Function: When this parameter is configured to ON, the heater burnout
alarm is held ON until one of the following reset conditions are satisfied:
• The Alarm Output is turned OFF when switching to the Initial Setting
function group, Communications Setting function group, Advanced
Setting function group, or Calibration function group, or
• Heater burnout detection is set to 0.0 A, or
• Controller power is cycled from ON to OFF.
• The latch is canceled by the PF key (900-TC8 only). PF Setting = LAT:
Alarm Latch Cancel.
• The latch is canceled by an event input. (Event Input Assignment 1 and
2 = LAT: Alarm Latch Cancel).
Table 5.CI
Selections Default Selection
on: Alarm Enabled
off: Alarm Disabled
on
hbu
hbl