Mitsubishi Electric MELSEC iQ-R RD75P4, Руководство пользователя

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7 CONTROL SUB FUNCTIONS
7.4 Function to Limit Control
Control precautions
• To limit the torque with the value set in [Pr.17] Torque limit setting value, check that [Cd.22] New torque value is set to 0. If
a value other than 0 is set for [Cd.22] New torque value, the value is validated and used to the torque limit. (Refer to

Page 254 Torque change function.)
• When the value set in [Pr.54] OPR torque limit value exceeds the value set in [Pr.17] Torque limit setting value, OPR torque
limit value error (Error code: 1B0EH) occurs.
• When the operation is stopped by the torque limit, a droop pulse remains in the deviation counter. If Deviation counter clear
is performed by issuing an external signal at this time, the position will be deviated when the operation is continued. If the
load torque is eliminated, the operation for the amount of droop pulses is performed.
Setting method
• To use the torque limit function, configure the required settings in the parameters shown in the following table, and write
them to the RD75. The settings are validated at the rising edge (when turned off and on) of PLC READY signal [Y0].
For details on the settings, refer to the following.

Page 394 [Pr.17] Torque limit setting value
 Page 418 [Pr.54] OPR torque limit value
The following table shows the buffer memory address of [Md.35] Torque limit stored value.
For details on the stored contents, refer to the following.

Page 461 [Md.35] Torque limit stored value
• Parameters are set for each axis.
• Setting the parameters using an engineering tool is recommended. To perform the setting using programs,
many programs and devices are required. The execution becomes complicated, and the scan times will
increase.
Setting item Setting
value Setting detail Initial value at the
factory
[Pr.17] Torque limit setting value

Set the torque limit value in percentage. 300
[Pr.54] OPR torque limit value

Set the torque limit value after the reach of [Pr.47] Creep speed in
percentage. 300
Monitor item Monitor
value Stored contents Buffer memory address
Axis 1 Axis 2 Axis 3 Axis 4
[Md.35] Torque limit stored value

Torque limit value which is valid at that time is stored.
([Pr.17] Torque limit setting value, [Pr.54] OPR torque limit
value, or [Cd.22] New torque value) 826 926 1026 1126