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C-mode Command Details Section 4-3
4-3-17 TIMER/COUNTER SV READ 1 – – R#
Reads the constant SV (4 digits BCD) written in the operands of designated
timer/counter instructions from cyclic task 0. If there are multiple timer/counter
instructions designated in cyclic task 0, TIMER/COUNTER SV READ 1 will
read the SV of the designated instruction with the lowest program address.
Command Format
Note “SP” represents a space (20 Hex).
Response Format
Parameters Timer/Counter Type (Command)
Designate in ASCII characters the type of TC instruction for reading the con-
stant SV.
Timer Counter Number (Command)
Designate in four digits (BCD) the timer/counter number for reading the con-
stant SV.
Limitations Timers T2048 to T4095 and counters C2048 to C4095 cannot be read.
The second word of the instruction must be a constant.
This command cannot be executed while UM read protection is in effect.
If there are multiple relevant instructions in the UM Area, a search will be con-
ducted from program address 0, and the first instruction found will be read.
SV can be read only from cyclic task 0.
Execution Conditions
@
FCS
R
#
x 10
1
x 10
0
* ↵
x 10
3
x 10
2
x 10
1
x 10
0
Unit No. (BCD)
Header
code
TerminatorTimer/counter
number
Timer/counter type
Instruction name Timer/counter type Timer/counter
number (BCD)
Char-
acter 1
Char-
acter 2
Char-
acter 3
Char-
acter 4
HIGH-SPEED COUNTER
WAIT
T M H W 0000 to 2047
TIMER WAIT T I M W
COUNTER WAIT C N T W
HIGH-SPEED TIMER T I M H
TOTALIZING TIMER TTI M
REVERSIBLE COUNTER C N T R
TIMER T I M (SP)
COUNTER C N T (SP)
@
FCS
R#
x 10
1
x 10
0
x 16
1
x 16
0
* ↵
x 10
3
x 10
2
x 10
1
x 10
0
SV of instruction des-
ignated by command
(constant)
TerminatorUnit No. (BCD) Header
code
End code
Commands Responses PLC Mode UM Area
Single Multiple Single Multiple RUN MON PROG Write-protected Read-protected
OK No OK No OK OK OK OK No
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