Mitsubishi Electric MELSEC iQ-F FX5 User Manual page 164

Heater disconnection/output OFF-time current error detection delay count
Set the limit value for consecutive heater disconnection detections and output off-time current error detections so that the
number of errors exceeding the limit value triggers an alert judgment. This is the common setting for all channels.
For details on the heater disconnection detection function, refer to the following.
Page 63 Heater Disconnection Detection Function
For details on the output off-time current error detection function, refer to the following.
Page 63 Output OFF-time Current Error Detection Function
■Buffer memory address
The following table shows the buffer memory address of this area.
Buffer memory name
Heater disconnection/output OFF-time current error detection delay count
Heater disconnection/output OFF-time current error detection delay count (If
using FX3 allocation mode)
■Setting range
The setting range is 3 to 255 (times).
■Default value
The default value is 3 (times).
CT monitor method switching
Set the method for executing the heater current measurement. This is the common setting for all channels.
■Buffer memory address
The following table shows the buffer memory address of this area.
Buffer memory name
CT monitor method switching
CT monitor method switching (If using FX3 allocation mode)
■Setting range
• 0: ON current/OFF current
• 1: ON current
When ON/OFF current (0) is set, the present current value of the current sensor (CT) is process.
When ON current (1) is set, the current value of the heater being OFF is fixed as the current value of the heater previously
being ON.
■Default value
The default value is ON/OFF current (0).
CH1 Heater disconnection alert setting
Sets the value if a current error is detected when a disconnection is detected and outputs are OFF.
• A heater disconnection alert occurs if the heater current process value while control outputs are ON is below the heater
disconnection alert settings. ('Event' (Un\G429) b9 turns ON.)
• A current error alert occurs when outputs are OFF if the heater current process value when control outputs are OFF is the
heater disconnection setting or greater. ('Event' (Un\G429) b10 turns ON.)
For details on the heater disconnection detection function, refer to the following.
Page 63 Heater Disconnection Detection Function
For details on the output off-time current error detection function, refer to the following.
Page 63 Output OFF-time Current Error Detection Function
Precautions
If external outputs are selected using control mode switching, the heater disconnection alert function is disabled.
APPX
162
Appendix 4 Buffer Memory Areas
CH1 CH2
2000
235
CH1 CH2
2002
238
CH3 CH4
CH3 CH4