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mitsubishi MELSEC-QL mitsubishi_MELSEC-QL MELSEC Communication Protocol Reference Manual
Introduction:


WARNING
• When changing data of a running programmable co ntroller from a peripheral connected to the
CPU module or from an external device such as a personal computer connected to an intelligent
function module, configure an interlock circuit in the program to ensure that the entire system
will always operate safely.
For other controls to a running programmable controller (such as program modification or
operating status change), read relevant manuals carefully and ensure the safety before the
operation.
Especially, in the case of a control from an external device to a remote programmable controller,
immediate action cannot be taken for a probl em on the programmable controller due to a
communication failure.
To prevent this, configure an interlock circuit in the program, and determine corrective actions to
be taken between the external device and CPU module in case of a communication failure.
• Do not write any data in the "system area" of the buffer memory of the intelligent function
module.
Also, do not output (turn on) the "use prohibited" signal, which is one of the output signals from
the CPU module to the intelligent function module.
If data is written to the "system area" or the "use prohibited" signal is output, the programmable
controller system may malfunction.

MR-E-100A-KH003
MR-J2S-700A
FX1N-40MT-001
MR-JCCBL30M-H
MR-JHSCBL5M-H
MR-J2HBUS5M-A
MR-JACN22K
MR-E200A
MR-J2HBUS1M-A
HA-LFS15K1MB
Q172HBCBL05M-B
MR-J3-100B
MR-J3ENSCBL2M-L
MR-J2S-60B
HA-LFS11K1M4
HF-MP73B
Q1MEM-1MS
Q1MEM-128S
FX1S-10MR-ES/UL
MR-EKCBL5M-L
FX3G-40MR/DS
MR-JCCBL2M-L
MR-J2CNS
MR-ECN1(20pcs)
Q1MEM-64S
FX2N-16LNK-M
FX2NC-64MT
Q3MEM-8MBS
HF-MP23B
Q3MEM-8MBS-SET
FX3UC-64MT/D
MR-ESCBL10M-L
A2SMCA-14KE
MR-J3JCBL03M-A2-L
Q2MEM-4MBF
MR-PWS1CBL5M-A2-H
Q170BDCBL5M
Q173J2B4CBL05M
MR-DCL30K-4
MR-BKS2CBL03M-A2-L
FX3UC-16MT/D
MR-ENCNS
MR-J3BUS10M-A
MR-HENC
MR-PWS2CBL03M-A2-L
FX3U-7DM
MR-ESCBL2M-H
FX2N-48MR-UA1/UL
FX3U-128MT/ES-A
MR-PWS2CBL03M-A1-L
mitsubishi MELSEC-QL mitsubishi_MELSEC-QL MELSEC Communication Protocol Reference Manual
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