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App-164
*10: The Universal model QCPU except the Q00UJCPU, Q00UCPU, and Q01UCPU.
*11: The Universal model QCPU except the Q00UJCPU, Q00UCPU, Q01UCPU, and Q02UCPU.
TableApp.4.4 Special register
Number Name Meaning Explanation
Set by
(When Set)
Corres-
ponding
ACPU
D9
Corresponding
CPU
SD254
MELSECNET/
10.
MELSECNET/H
information
Number of
modules installed
• Indicates the number of mounted MELSECNET/10 modules or
MELSECNET/H modules.
S (Initial) New
QCPU
SD255
Information from 1st module
I/O No.
• Indicates I/O number of mounted MELSECNET/10 module or
MELSECNET/H module
SD256
Network
No.
• Indicates network No. of mounted MELSECNET/10 module or
MELSECNET/H module
SD257
Group
number
• Indicates group No. of mounted MELSECNET/10 module or
MELSECNET/H module
SD258
Station
No.
• Indicates station No. of mounted MELSECNET/10 module or
MELSECNET/H module
SD259
Standby
informa-
tion
• In the case of standby stations, the module number of the standby
station is stored. (1 to 4)
Qn(H)
QnPH
QnPRH
QnU
*10
SD260
to
SD264
Information from
2nd module
• Configuration is identical to that for the first module.
SD265
to
SD269
Information from
3rd module
• Configuration is identical to that for the first module.
Qn(H)
QnPH
QnPRH
QnU
*11
SD270
to
SD274
Information from
4th module
• Configuration is identical to that for the first module.
SD280 CC-Link error
Error detection
status
1) When Xn0 of the mounted CC-Link module turns ON, the bit of the
corresponding station turns to 1 (ON).
2) When either Xn1 or XnF of the mounted CC-Link module turns OFF, the
bit of the corresponding station turns to 1 (ON).
3) Turns to 1 (ON) when communication between the mounted CC-Link
module and CPU module cannot be made.
The above module Nos. n are in order of the head I/O numbers.
(However, the one where parameter setting has not been made is not
counted.)
S (Error) New
Qn(H)
QnPH
QnPRH
b0
3rd
module
4th
module
b3
b4
b7b8
b11b12
b15
Information
of 2)
Information
of 1)
to tototo
Information
of 3)
Empty
1st
module
2nd
module