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10-3-19 SV READ 3 –– R%
Reads the constant SV or the word address where the SV is stored. The SV that
is read is a 4-digit decimal number (BCD) written in the second word of the TIM,
TIMH(15), CNT, CNTR(12), or TTIM(87) instruction at the specified program ad-
dress in the user’s program.
Command Format
x 10
3
OP4OP3OP2OP1
@ R%
x 10
2
x 10
2
x 10
0
x 10
1
x 10
5
x 10
4
x 10
3
x 10
0
x 10
1
x 10
1
x 10
0
↵
Node no. Program
address
Must be “0”
Mnemonic Timer/counter
(0000 to 0511)
TerminatorFCS
Header
code
Use all four characters to specify the timer or counter instruction’s mnemonic.
Add a space to the end of a TIM or CNT mnemonic to make it 4 characters long.
Instruction name
Mnemonic
TC number
OP1 OP2 OP3 OP4
range
TIMER T I M (Space)
0000 to 0511
HIGH-SPEED TIMER T I M H
COUNTER C N T (Space)
REVERSIBLE COUNTER C N T R
TOTALIZING TIMER T T I M
Response Format
@ R%
OP1 OP2 OP3 OP4x 16
0
x 10
0
x 10
0
x 10
1
x 16
1
x 10
3
x 10
2
x 10
1
↵
Node no. Header
code
End code Operand SV TerminatorFCS
The “Operand” parameter indicates the data area where the SV is stored or a
constant. The “SV” parameter indicates the word address or the SV itself if it is a
constant.
Operand
Classification Constant or
OP1 OP2 OP3 OP4
word address
C I O (Space) IR or SR 0000 to 0511
L R (Space) (Space) LR 0000 to 0063
H R (Space) (Space) HR 0000 to 0099
A R (Space) (Space) AR 0000 to 0027
D M (Space) (Space) DM 0000 to 6655
D M (Space) DM (indirect) 0000 to 6655
C O N (Space) Constant 0000 to 9999
E M (Space) (Space) EM 0000 to 6143
E M (Space) EM (indirect) 0000 to 6143
Limitations The command is valid only when the UM setting is ladder only.
The command can’t be executed if the UM area is read-protected.
SR 253 through SR 255 can’t be specified.
Host Link Commands
Section 10-3