Hardware manual

Chapter2 Connection to a PLC
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5.5.2 S7-300/S7-400
When using CP-341/441, following devices can be read and written.
When using CP-340440, only a data block (DB) can be read and written.
・ Bit Device
Device Symbol
Device Name
HG PLC
Address Range
Read
/Write
Address
Gradual
Input (Bit)
I I 0 - 1277
R (*1)
Output (Bit)
Q Q 0 - 1277
R (*1)
Memory (Bit)
M M 0 - 2557
R (*1)
・ Word Device
Device Symbol
Device Name
HG PLC
Address Range
Read
/Write
Address
Gradual
Input (Word) IW IW 0 - 126 R (*2)
Output (Word) QW QW 0 - 126 R (*2)
Bit Memory (Word) MW MW 0 - 254 R (*2)
Timer cell T T 0 - 127 R Dec
Counter cell C C 0 - 63 R Dec
Data Block DB DB 1000 - 255510 R/W (*2) (*3)
(*1) The 1st figure is written in octal number format,
and the 2nd [or more] figure is written in decimal number format.
(*2) Only an even number can be specified.
(*3) Please specify in the following ranges.
DB 255 510
Address 0 - 510
DB No. 1 - 255
- When a non activated data block is accessed in the PLC, a communication error will occur.
Please be sure to activate relevant data blocks in the PLC.
- Endians differ in S7-300, and MICRO/I type. Please use neither bit specification of a WORD
device, nor 32-bit WORD (double WORD).