1) When the indexing parameter = 0, all indexes will be written upon parameter
access in EEPROM. 17 (for 16 indexes) or 33 (for 32 indexes) will write all indexes in
The values are entered automatically in the EEPROM of the controller. However, only
a limited number of write cycles is permissible for the EEPROM (approx. 1 million
cycles). When this number is exceeded, the EEPROM will be destroyed.
• Values which are written cyclically at a high repetition rate should be written to
the RAM and not the EEPROM.
In the RAM, the data is not protected against loss of power. Once power supply is
disrupted, the data must be written again.
8.1.6.1 Example: Writing of index parameters
Typically, index parameters are written regularly during commissioning or in simple
positioning applications.
Writing of Parameter 1202 Target position/distance (Type double word), in Index 1
in RAM ( Index 34 for write access) with parameter value 30000.
First step: Set index parameter
= 2 (Order code = write int/uint parameter value)
code
value
value
= 1 (response code = transmit int/uint parameter value)
10/13 CM-PROFINET 37
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