RKC INSTRUMENT RB Series User Manual

8. PARAMETER DESCRIPTION
IMR02C15-E4 8-31
Heater break alarm 1 (HBA1) set value
Heater break alarm 2 (HBA2) set value
Factory default setting:
The screen is displayed.
HBA1 and HBA2 are to set the set values for the Heater break alarm (HBA)
function.
Data range Factory set value
0.0 to 30.0 A (CTL-6-P-N)
0.0 to 100.0 A (CTL-12-S56-10L-N)
(0.0: Unused [Current value can be monitored])
0.0
HBA1 and HBA2 display when CT input (optional) is specified and the
value “22: Heater break alarm (HBA)” is set to Event 1 type (ES1)
through Event 4 type (ES4) (P. 8-101) at Function blocks from F41 to F44
in the Engineering mode.
HBA1 and HBA2 are not displayed when the block selection at F07
[S.F07] (P. 8-79) is set to “1: No display” in the Engineering mode.
Related parameters
Engineering mode:
• Heater break alarm 1 (HBA1) set value,
Heater break alarm 2 (HBA2) set value (P. 8-77)
• CT ratio (Number of turns) (P. 8-122)
• Number of HBA delay times (P. 8-123)
 For the setting of the Heater break alarm
• Set the set value to approximately 85 % of the maximum reading of the CT input.
• Set the set value to a slightly smaller value to prevent a false alarm if the power supply becomes
unstable.
• When more than one heater is connected in parallel, the HBA set value may need to be increased to
detect a single heater failure.
 Description of function
Heater break alarm (HBA) can only be used with time-proportional control output (relay, voltage
pulse, or triac output).
The HBA function monitors the current flowing through the load by a dedicated current transformer
(CT), then compares the measured value with the HBA set values, and detects a fault in the heating
circuit.
Low or No current flow (Heater break, malfunction of the control device, etc.):
When the control output is ON and the CT input value is equal to or less than the heater break
determination point for the preset number of consecutive sampling cycles, an alarm is activated.
Over current or short-circuit:
When the control output is OFF and the CT input value is equal to or greater than the heater break
determination point for the preset number of consecutive sampling cycles, an alarm is activated.
HBA1
HBA2

RKC INSTRUMENT RB Series Specifications

General

Brand	RKC INSTRUMENT
Model	RB Series
Category	Temperature Controller
Language	English