Mitsubishi Electric MELSEC-Q Series User Manual page 631

Each operation
PLC READY signal [Y0]
All axis servo ON [Y1]
Positioning start signal [Y10]
Torque limit setting value
Pr.17
Torque output setting
Cd.101
value
Torque change function
Cd.112
switching request
New torque value/
Cd.22
forward new torque value
Torque limit stored value/
Md.35
forward torque limit
stored value
1: The torque limit setting value or torque output setting value becomes effective at the PLC READY signal [Y0] rising edge
(however, after the servo turned ON.)
If the torque output setting value is "0" or larger than the torque limit setting value, the torque limit setting value will be its value.
2: The torque limit setting value or torque output setting value becomes effective at the positioning start signal [Y10] rising edge.
If the torque output setting value is "0" or larger than the torque limit setting value, the torque limit setting value will be its value.
3: The torque change value is cleared to "0" at the positioning start signal [Y10] rising edge.
[3] Precautions during control
[2] Control details
The following drawing shows the operation of the torque limit function.
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Fig. 13.11 Torque limit function operation
(1) When limiting the torque at the "[Pr.17] Torque limit setting value", confirm
that "[Cd.22] New torque value/forward new torque value" or "[Cd.113] New
reverse torque value" is set to "0". If this parameter is set to a value besides
"0", the setting value will be validated, and the torque will be limited at that
value. (Refer to Section 13.5.4 "Torque change function" for details about
the "new torque value".)
(2) When the "[Pr.54] HPR torque limit value" exceeds the "[Pr.17] Torque limit
setting value", the error "HPR torque limit value error" (error code: 995)
occurs.
(3) When the operation is stopped by torque limiting, the droop pulse will remain
in the deviation counter. If the load torque is eliminated, operation for the
amount of droop pulses will be carried out. Note that the movement might
start rapidly as soon as the load torque is eliminated.
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Chapter 13 Control Sub Functions
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