Mitsubishi Electric MELCEC Q Series User Manual page 236

APPENDICES
Number Name
D9173 Mode setting
Setting of the
D9174 number of
retries
Line error retry
D9175
counter
D9180
D9181
D9182
D9183
D9184
D9185
Remote
D9186
terminal module
D9187
error number
D9188
D9189
D9190
D9191
D9192
D9193
Table App.2.2 Special Register List (continued)
Description
Mode setting
0 Auto-
matic
online
return
enabled
1 Auto-
0: Automatic online
matic
return enabled
online
1: Automatic online
return
return disabled
disabled
2: Transmission
stop at online
error
3: Line check
2 Trans-
mission
stop at
online
error
3 Line
check
• Sets the number of retries executed to I/O modules
and remote terminal modules which caused
communication error.
• Set for 5 times at power on.
Number of retries • Set range: 0 to 32
• If communication with an I/O module or a remote
terminal module is not restored to normal after set
number of retries, such module is regarded as a faulty
station.
• Stores the number of retries executed at line error
(time out).
Number of retries • Data becomes 0 when line is restored to normal and
communication with I/O modules and remote terminal
modules is resumed.
• Stores error code of a faulty remote terminal module
when M9060 is turned on.
• The error code storage areas for each remote terminal
module are as shown below.
D9180
D9181
D9182
Remote terminal
number
D9192
D9193
• Error code is cleared in the following cases.
• When the RUN key switch is moved from STOP to
RUN.
(D9180 to D9183 are all cleared.)
• When Yn4 of each remote terminal is set from off to on.
Details
• When an I/O module or a remote
terminal module caused communication
error, the station is placed offline.
• Communication with normal stations is
continued.
• The station recovering from a
communication error automatically
resumes communication.
• When an I/O module or a remote
terminal module caused communication
error, the station is placed offline.
• Communication with normal stations is
continued.
• Though a faulty station returned to
normal, communication is not restored
unless the station module is restarted.
• When an I/O module or a remote
terminal module caused communication
error, communication with all stations is
stopped.
• Though a faulty station returned to
normal, communication is not restored
unless the station module is restarted.
• Checks hardware and connecting cables
of I/O modules and remote terminal
modules.
Remote terminal module No.1
Remote terminal module No.2
Remote terminal module No.3
Remote terminal module No.13
Remote terminal module No.14
App - 42
Applicable CPU
Usable with
—
A2C and A52G.
Usable with
—
A2C and A52G.
Usable with
—
A2C and A52G.
Remote
terminal
module
numbers
Usable with
—
from 1 to 14
A2C and A52G.
are set with
D9020 to
D9034.