Siemens Simatic M7-400 Reference Manual page 123

Digital Modules
Structure of the Chapter
The present chapter is subdivided into the following subjects:
1. Overview containing the modules that are available here and a description
2. Information that is generally valid – in other words, relating to all digital modules
(for example, parameter assignment and diagnostics)
3. Information that refers to specific modules (for example, characteristics,
diagram of connections and block diagram, technical specifications and special
characteristics of the module):
a) for digital input modules
b) for digital output modules
Additional Information
Appendix A describes the structure of the parameter records (data records 0, 1 and
128) in the system data. You must be familiar with this structure if you want to
modify the parameters of the modules in the STEP 7 user program.
Appendix B describes the structure of the diagnostic data (data records 0, 1) in the
system data. You must be familiar with this structure if you want to evaluate the
diagnostic data of the modules in the STEP 7 user program.
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
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