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C-mode Command Details Section 4-3
If the SV is a DM or EM indirect address, only indirect BCD designations will
be read and an end code of 16 (command not supported) will be returned if
the indirect designation is not BCD.
SV can be read only from cyclic task 0.
Execution Conditions
End Codes An end code of 14 (format error) will be returned if the length of the command
is incorrect.
An end code of 15 (entry number data error) will be returned if the program
address is not specified in BCD or the operand/SV parameters are incorrect.
An end code of 16 (command not supported) will be returned if the specified
instruction does not exist in the UM Area.
4-3-19 TIMER/COUNTER SV READ 3 – – R%
From the specified program address onwards in cyclic task 0, TIMER/
COUNTER SV READ 3 finds the specified TC instruction and reads the con-
stant SV that is set or the word address where the SV is stored. The SV that is
read is a 4-digit decimal number (BCD).
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
End code (Hex) Contents
00 Normal completion
04 Address over
13 FCS error
14 Format error
15 Entry number data error
16 Command not supported
18 Frame length error
21 Not executable due to CPU Unit CPU error.
23 User memory protected
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