January 2012 8.41 PLC Modules 1753
Module 9010/9011/9012 Read in the word range
From the specified location in the word memory the control reads a byte, word
or double word and returns it as an output quantity to the stack. Indexed
reading is possible by specifying a variable as designation of the memory
location.
Call:
PS
B/W/D/K
<Address of the byte to be read>
CM 9010 ; READ BYTE
PL B <Target address for byte that was read>
PS
B/W/D/K
<Address of
the word to be read>CM 9011 ; READ WORD
PL B <Target address for word that was read>
PS
B/W/D/K
<Add
ress of the double word
to be read>
CM 9012 ; READ DOUBLE WORD
PL B <Target address for double word that was read>
Error recognition:
Example of
Module 9010
Initial state:
Byte B10 = 35 (address)
Byte B35 = 80 (byte to be read)
Byte B100 = ?
Marker Value Meaning
NN_GenApiModule
Error (M4203)
0 Byte was read
1 Error code in NN_GenApiModuleErrorCode
(W1022)
NN_GenApiModule
ErrorCode (W1022)
3 Invalid address was programmed
5 Module 9011: Specified address is not a
word address
Module 9012: Specified address is not a
double word address
Function STL Accumulator
content (dec)
Data stack (dec)
Save the address
(B10) of the byte to
be read from the
word accumulator in
the data stack
PS B10 35 35
Read byte B35 and
save in the data
stack
CM 9010 80
Save data stack in
byte B100.
PL B100 80 80
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