BECKHOFF EtherCAT Technology Section I - Manual (Page 93)

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
Word
Address
Parameter Description Register
Address
0x0 PDI Control/
ESC Configuration Initialization value for PDI Control register
(EEPROM ADR 0x0000[9] is also mapped to
register 0x0110[2]) 0x0140:0x0141
0x1 PDI Configuration Initialization value for PDI Configuration
register 0x0150:0x0151
0x2 Pulse Length of
SYNC Signals Initialization value for Pulse Length of SYNC
Signals register 0x0982:0x0983
0x3 Extended PDI
Configuration Initialization value for extended PDI
Configuration register 0x0152:0x0153
0x4 Configured Station
Alias Initialization value for Configured Station Alias
Address register 0x0012:0x0013
0x5 Reserved Reserved, shall be zero -
0x6 Reserved Reserved, shall be zero -
0x7 Checksum 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.