Mitsubishi Electric MELSEC-Q Series User Manual page 75

(7) Precautions
(a) Parameter setting
Parameters cannot be set in the following cases.
• Upon an error in the AnyWireASLINK system (Example: Short-circuit, 24VDC external power supply
voltage drop)
• Within approximately five seconds after the AnyWireASLINK system is powered on or the system is reset
• When the automatic address detection is in progress (While Automatic address detection flag (X(n+1)4) is
on)
• When parameter access is in progress (While Parameter access request command for the slave module
(Y(n+1)0), Parameter batch read command for the slave module (Y(n+1)1), or Parameter batch write
command for the slave module (Y(n+1)2) is on)
• When any of the following errors has occurred
0064H
0065H
0067H
00C8H
00C9H
(b) Parameter reading and writing
• If parameters are not read after being written, the contents of the parameters do not match between the
master module and slave module. Make sure to read parameters after writing them.
• When parameter reading or writing is in progress, Parameter access completion flag (X(n+1)1) turns off.
Refer to the section describing the parameter access timing, and adjust the access timing. ( Page 72,
Section 8.8 (6))
• When parameter reading or writing is in progress, do not execute re-access to the parameters and
automatic address detection. Doing so can cause a malfunction of the module.
(c) Parameter access, parameter batch read, and parameter batch write
• These operations cannot be performed to a slave module whose ID has not been registered in the master
module.
• Clear a no ID setting error or a same ID used error of the slave module. Then perform the operations.
(d) Others
• The parameter batch read is executed at the same time as when the automatic address detection is
executed.
• Note that the master module may communicate with a slave module and output parameters even if no
parameters are set.
Error code Error description
Master module hardware error
Master module hardware error
Master module hardware error
Transmission cable voltage drop error
DP/DN short error
CHAPTER 8 FUNCTIONS
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