Mitsubishi Electric FR-CC2-P, Instruction Manual

Page: 111 / 184

(T) Multi-function input terminal parameters
110
PARAMETER
5.5.2
Operation selection for the external thermal
relay input (Pr.876)
 External thermal relay (OH signal, E.OHT)
External thermal relay input connection diagram
• The External thermal relay input (OH) signal is used when using the external thermal relay or the thermal protector built into
the motor to protect the motor from overheating.
• When the thermal relay is activated, the inverter output is shut off by the External thermal relay operation (E.OHT).
• The OH signal is assigned to terminal OH in the initial status. Set "7" in any of
Pr.178, Pr.187, or Pr.189 (Input terminal
function selection) to assign the OH signal to another terminal.
NOTE
• Changing the terminal assignment using Pr.178, Pr.187, or Pr.189 (Input terminal function selection) may affect the other
functions. Set parameters after confirming the function of each terminal.
 Operation selection for the OH signal (Pr.876)
• The OH signal input status and the Pr.876 setting for the converter operation are as shown below.
The operation when the external thermal relay input (OH) signal is input can be changed by the Pr.876 setting.
Pr. Name
Initial
value Setting
range
Description
876
T723
OH input selection
0
0 No function
1
The converter unit output is shut off by turning OFF the OH
signal. (NC contact)
2
The converter unit output is shut off by turning ON the OH
signal. (NO contact)
OH signal input status
(external terminal)
Converter unit operation
Pr.876 = "0" Pr.876 = "1" (NC contact) Pr.876 = "2" (NO contact)
ON No function Continuous operation Inverter trip (E.OHT)
OFF No function Inverter trip (E.OHT) Continuous operation
Inverter
Converter
unit
Thermal relay protector
Motor
U
V
W
OH
SD
M