Siemens S7-300 - 4.2 Addressing the Channels

Addressing and installation
4.2 Addressing the Channels
Fail-safe signal modules
Installation and Operating Manual, 01/2010, A5E00085586-10
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4.2 Addressing the Channels
Addresses of fail-safe signal modules
The channels of fail-safe signal modules are addressed similar to S7-300 standard I/O
modules.
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2XWSXW %\WHDGGUHVV %LWDGGUHVV
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The byte address is derived from the module start address set in the object properties of the
module in
STEP 7HW Config . The bit address is derived from the channel's position at the
module. A byte address is always assigned eight channels in successive order.
Address space allowed for use in standard mode
Address space allowed for the byte address:
●
S7 Distributed Safety and S7 F/FH Systems : the entire I/O area (within and outside the
process image), depending on the CPU used
For the SM 326; DI 24 x DC 24 V (order no. 6ES7326-1BK00-0AB0),
SM 326; DI 8 x NAMUR, SM 326 DO 10 x DC 24V/2A and
SM 336; AI 6 x 13 Bit also applies: 8 to 8184 in increments of 8.
Address space allowed for use in safety mode
Address space allowed for the byte address:
●
S7 Distributed Safety : within the area of the process image, depending on the F-CPU
used
For the SM 326; DI 24 x DC 24 V (order no. 6ES7326-1BK00-0AB0),
SM 326; DI 8 x NAMUR, SM 326 DO 10 x DC 24V/2A and
SM 336; AI 6 x 13 Bit also applies: 8 to 8184 in increments of 8.
●
S7 F/FH Systems : within the area of the process image, depending on the F-CPU used
For the SM 326; DI 24 x DC 24 V (order no. 6ES7326-1BK00-0AB0),
SM 326; DI 8 x NAMUR, SM 326 DO 10 x DC 24V/2A and
SM 336; AI 6 x 13 Bit also applies: 8 to 8184 in increments of 8.
Accessing channels of F-SMs operating in standard mode
Channels of the F-SMs are accessed similar to the channels of S7-300 standard I/O
modules.