
SII EEPROM
Slave Controller – Technology I-73
11.1 SII EEPROM Content
The ESC Configuration Area (EEPROM word addresses 0 to 7) is automatically read by the ESC after
power-on or reset. It contains the PDI configuration, DC settings, and the Configured Station Alias.
The consistency of the ESC Configuration data is secured with a checksum.
For SII coding refer to ETG.1000 EtherCAT Specification, Part 6, Clause 5.4, available in the
download area of the EtherCAT Technology Group website (http://www.ethercat.org).
The EtherCAT master can invoke reloading the EEPROM content. In this case the Configured Station
Alias register 0x0012:0x0013 and ESC Configuration register bits 0x0141[1,4,5,6,7] (enhanced link
detection) are not transferred into the registers, they are only transferred at the initial EEPROM
loading after power-on or reset.
The ESC Configuration Area is shown in Table 37.
Table 37: ESC Configuration Area
PDI Control/
ESC Configuration
Initialization value for PDI Control register
(EEPROM ADR 0x0000[9] is also mapped to
register 0x0110[2])
Initialization value for PDI Configuration
register
Pulse Length of
SYNC Signals
Initialization value for Pulse Length of SYNC
Signals register
Extended PDI
Configuration
Initialization value for extended PDI
Configuration register
Initialization value for Configured Station Alias
Address register
Low byte contains remainder of division of
word 0 to word 6 as unsigned number divided
by the polynomial x
8
+x
2
+x+1(initial value
0xFF).
NOTE: For debugging purposes it is possible to
disable the checksum validation with a checksum
value of 0x88A4. Never use this for production!
NOTE: Reserved words or reserved bits of the ESC Configuration Area should be filled with 0.
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