Thermal Protector Input - Mitsubishi Electric 800 Series Instruction Manual

4.2

Thermal protector input

Pr.
Pr. Name
group
876 H022 Thermal protector input
• When the motor with a temperature detector for overheat protection is used, use terminal OH to input contact signals of the
thermal relay, etc. for overheat protection of a motor.
• Use Pr.876 to set valid/invalid status of terminal OH function when the FR-A8TP is installed.
• When terminal OH is valid and the OH signal turns OFF, the protective function (E.OHT) is activated.
• Set "7" in any of Pr.180 to Pr.182, or Pr.185 (input terminal function selection) to assign the OH signal to another
terminal.
NOTE
• Change the external thermal relay switch (SW5A) position to switch the terminal OH control logic (sink logic or source logic)
as necessary.
Sink: When the connection between terminals OH and SD is open, E.OHT is activated.
Source: When the connection between terminals OH and PC is open, E.OHT is activated.
• Terminal OH is always for the OH signal. Any other signals cannot be assigned to terminal OH.
Initial Setting
value range
0 Terminal OH is invalid.
1
1 Terminal OH is valid.
SINK SOURCE
Description
PARAMETER
4
45