Siemens SIMATIC LOGO! CMR2020 Operating Instructions Manual page 125

Reading the current value from the BM variables memory: Read "current values"
Function Reading the current value from the BM variables memory.
You obtain the address from the BM variables memory. The value <data type> is BYTE, WORD or
DWORD.
Only the first 128 bytes of the BM variables memory can be read and written to.
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You can read any value from the BM variables memory. If you know the LOGO! control program
precisely, this can, for example, be useful for diagnostics purposes.
Access Reading, no password necessary
Structure and key- LOGO?VM<address>,<data type>
word
Return values Current value or error message: SMS error messages (Page 121)
Structure of the returned value: VM<address>:<value>(<data type>)
Output: Decimal output of the returned value
Example Send SMS message: LOGO?VM125,WORD
Reply SMS message: VM125:1(WORD)
Setting value in the BM variables memory: Write "current values"
Function Setting values of a component in the BM variables memory, e.g. inputs, outputs, flags.
You obtain the address of the component from the BM variables memory.
Only the first 128 bytes of the BM variables memory can be read and written to.
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By setting a value in the BM variables memory, you can change the running of a LOGO! control
program.
Only use this command if you have precise knowledge of the control program!
Access Writing, password required
Structure and key- <password>;LOGO=VM<address>,<value>,<data type>
word
Return values Confirmation or error message: SMS error messages (Page 121)
Example Send SMS message: Password;LOGO=VM125,1,WORD
Reply SMS message: LOGO=VM125,1,WORD: OK
Set digital output of the CMR
Function Setting the digital output 1 or 2 of the CMR to a value: 1 or 0.
Access Writing, password required
Structure and key- <password>;OUTPUT=O<1/2>,<1/0>
word
LOGO! CMR2020 / LOGO! CMR2040
Operating Instructions, 09/2014, C79000-G8976-C356-01
BYTE: 0 ... 127
WORD: 0 ... 126
DWORD: 0 ... 124
BYTE: 0 ... 127
WORD: 0 ... 126
DWORD: 0 ... 124
7.3 SMS message structures and examples
Operation
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