Siemens SIMATIC ET 200M Operating Instructions Manual page 257

Identification and maintenance data
Identification data (I data) contain module information some of which is also printed on the
module housing. I data are read-only.
Maintenance data (M data) contain system-specific information, such as location and date of
installation etc. M data are created and written to the module during configuration.
Identification and maintenance data (I&M) are data that are stored in a module for assisting
you in:
• Checking the system configuration
• Locating hardware changes in a system
• Troubleshooting a system
I&M data enable modules to be uniquely identified online.
Industrial Ethernet
Industrial Ethernet (previously SINEC H1) is a technology that allows data to be transferred
fail-safe in an industrial environment.
Standard Ethernet components can be used since the PROFINET is an open system. However,
we recommend setting up PROFINET as Industrial Ethernet.
IP 20
Degree of protection in accordance with DIN 40050: protection to prevent finger contact and
intrusion of particles larger than 12mm Ø.
Isochronous
Clock synchronism causes all affected cycles (e.g. user program cycle, DP bus cycle, signal
processing cycle in the DP slaves) to run synchronously and for the same length of time.
Thus, process response times will also be of the same length and can be reproduced.
Isochronous real-time communication
Synchronized transmission method for the cyclic exchange of IRT data between PROFINET
devices.
A reserved bandwidth is available within the send cycle for IRT IO data. The reserved
bandwidth guarantees that IRT data can also be transferred at reserved, synchronized
intervals while other, higher network loads are active (for example TCP/IP communication, or
additional real-time communication).
Isolated
For isolated I/O modules the reference potentials of the control and load circuits are
electrically isolated, e.g. by using an optocoupler, relay contact or transmitter. Input and
output circuits can be rooted.
ET 200M
Operating Instructions, 04/2022, EWA-4NEB7806006-09
Glossary
257