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15.2.5 Thermal Detection
M720VW
M system
○
L system
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When overheating is detected in the control unit, an overheat signal is output at the same time as the alarm
is displayed. If the system is in automatic run at the time, run is continued, but it cannot be started after reset
or completion by M02/M30. (It can be started after block stop or feed hold.)
When the temperature falls below the specified temperature, the alarm is released and the overheat signal is
turned OFF.
The overheat alarm occurs at 80 C or more in the control unit.
(b)
(a) Overheat detection
(b) Control unit
(c) Parameter
(d) Temperature alarm
(e) User PLC
(f) Message display
(g) Cooling fan rotation
(h) Lamp alarm
(i) Emergency stop
(j) Others
(k) Bit device
(l) (a temperature of 80 C)
(m) (Default: valid)
(Note 1) If the parameter is used to set the temperature rise detection function to invalid, overheating may
occur, thereby disabling control and possibly resulting in the axes running out of control, which in
turn may result in machine damage and/or bodily injury or destruction of the unit. It is for this reason
that the detection function is normally left "valid" for operation.
M730VW
M750VW
○
○
○
○
(a)
(c)
(m)
(l)
M700V Series Specifications Manual
M720VS
M730VS
M750VS
○
○
○
○
(d)
(k)
(e)
15 Safety and Maintenance
○
○
(f)
(g)
(h)
(i)
(j)
III - 333
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