Troubleshooting Of The Slave Module - Mitsubishi Electric MELSEC-Q Series User Manual

10.7

Troubleshooting of the Slave Module

This section describes the troubleshooting of the slave module.
(1) When I/O data and parameter data of the slave module cannot be checked
Check the following buffer memory addresses in the
program.
• Input information area (Un\G0 to Un\G15)
• Output information area (Un\G4096 to Un\G4111)
Check the number of transmission points of the master
module and the address setting of the slave module.
Check the I/O LED status of the slave module.
Check that two or more master modules are not connected
within one AnyWireASLINK line.
(2) When the I/O data and parameter data of the slave module are unstable
Check the connection of the terminating unit.
Check the total length of the transmission cables (DP, DN).
Check the specifications of the transmission cables (DP,
DN).
Check the power supply voltage of the 24VDC external
power supply.
Check that the slave module does not have the same
address as the addresses of other slave modules.
Check that two or more master modules are not connected
within one AnyWireASLINK line.
Check that AnyWireASLINK master modules of different
series are not connected within one AnyWireASLINK line.
Check that a master module and an AnyWireASLINK bridge module
are not connected together within one AnyWireASLINK line.
100
Check item
Check item
Action
Check that information regarding the slave module has been
properly assigned and that the commands written in the
program are free from mistakes.
• Check that the address of the slave module is within the
number of transmission points of the master module.
• Check that the ID of the slave module is not the same as
the IDs of other slave modules.
Check the I/O LED status of the slave module and check that
there is no disconnection, short circuit, or poor contact in the
wiring on the load side.
Connect only one master module within one
AnyWireASLINK line.
Action
Pay attention to the polarities of the terminating unit and
connect it correctly.
Adjust the total length of the AnyWireASLINK system within
the specified range.
• Use transmission cables (DP, DN) that have the specified
type, wire diameter, and tightening torque to the terminal
block.
• Do not run multiple transmission cables (DP, DN) using a
multicore cable.
Adjust the power supply voltage of the 24VDC external
power supply within the rated value (21.6VDC to 27.6VDC).
(The recommended voltage is 26.4VDC.)
Set a unique address in the slave module.
Connect only one master module within one
AnyWireASLINK line.
Connect only one AnyWireASLINK master module within
one AnyWireASLINK line.
Connect either a master module or an AnyWireASLINK
bridge module within one AnyWireASLINK line.