Hitachi SJ Series, User Manual

Page: 408 / 786

12-19-11
Chapter 12 Inverter Function
12.19.9 Outputting a warning before
thermal protection of the inverter
• I want to check the motor current and output the
signal before the inverter electronic thermal
calculated by the inverter generates an error.
• I want to cool the system before a thermal error is
generated.
• Assign the output terminal function 027 [THC]
controller (inverter) thermal warning signal to one
of [CC-01] to [CC-07] that corresponds to the
output terminal and output the signal.
• You can understand the state from the signal
before the controller overload error [E039] is
generated by the electronic thermal function.
Operation example
Parameter
• The controller overload error [E039] will be
generated when the inverter thermal integrated
value reaches 100.00%.
• For the protection of inverters, electronic thermal
characteristics of inverters are fixed and specific to
the type.
• Inverter thermal values are cleared every 10
minutes. However, integration is processed in a
dual-redundant system, so that the value may not
be cleared when the current is high and the
integrated value increases.
Item Parameter Data Description
Output terminal function
selection 11-15
[CC-01]~[CC-05]
027
The thermal warning signal [THC] of the
inverter is output.
OFF: The inverter thermal integrated
value is smaller than the level.
ON: The inverter thermal integrated value
is equal to or larger than the level.
Relay output terminal
function selection 16A-16C
[CC-06]
Relay output terminal
function selection
AL1-AL0/AL2-AL0
[CC-07]
Electronic thermal warning
level
(controller (Inverter))
[CE-31] 0.00~100.00(%)
The signal [THC] is turned on when the
thermal integrated value of the inverter is
equal to or larger than the set level.
Ｑ
Ａ
！
Inverter (controller)
thermal integrated
value
[THC]
Output current
[CE-31]
Cleared every 10 minutes.
ON