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C-mode Command Details Section 4-3
Commands, Single
Single command frames are used when there are 131 characters or less.
Commands, Multiple
Tells whether the command can be spit into multiple frames when there are
more than 131 characters.
Responses, Single
Single response frames are used when there are 131 characters or less.
Responses, Multiple
Tells whether the response can be spit into multiple frames when there are
more than 131 characters.
PLC Modes, RUN
Tells if the CPU Unit will accept the command when the CPU Unit is in RUN
mode.
PLC Modes, MONITOR
Tells if the CPU Unit will accept the command when the CPU Unit is in MONI-
TOR mode.
PLC Modes, PROGRAM
Tells if the CPU Unit will accept the command when the CPU Unit is in PRO-
GRAM mode.
UM Area, Write-protected
Tells if the CPU Unit will accept the command when the UM Area is write-pro-
tected using the DIP switch on the CPU Unit.
UM Area, Read-protected
Tells if the CPU Unit will accept the command when the UM Area is read-pro-
tected using a Programming Device.
Note 1. WR Area words cannot be read or written using C-mode commands.
2. Timers 2048 to 4095 and counters 2048 to 4095 cannot be read or written
and their SV cannot be read or written using C-mode commands.
3. D10000 to D32767 and E10000 to E32767 cannot be read or written using
C-mode commands.
4. SV can be read and written only in cyclic task 0. Also, timer SV can be read
and written only when the timer number is not indirectly addressed.
4-3-2 CIO AREA READ – – RR
Reads the contents of the specified number of CIO words starting from the
specified word.
Command Format
Response Format
@
FCS
x 10
1
x 10
0
x 10
3
x 10
2
* ↵
R
R
x 10
1
x 10
0
x 10
3
x 10
2
x 10
1
x 10
0
Unit No. (BCD)
Header
code
Beginning word
(0000 to 6143)
No. of words
(0001 to 6144)
Terminator
@ R R
x 10
1
x 10
0
x 16
1
x 16
0
x 16
3
x 16
2
x 16
1
x 16
0
FCS
*
↵
End code Read data (1 word)
Read data (for number of words read)
TerminatorUnit No. (BCD) Header
code
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