Alternative Pdo Index Assignment; 750-354/000-001 Ethercat® Fieldbus Coupler, Id Switch; Table 36: Recommendations For Setting The 0X2100:01 - WAGO I/O-SYSTEM 750 Manual

WAGO-I/O-SYSTEM 750
750-354/000-001 EtherCAT® Fieldbus Coupler, ID Switch
Sync Manager Assignment Lists
The Sync Manager Assignment Lists 0x1C12 and 0x1C13 contain a list of all Rx
and TxPDO's that are cyclically transmitted. The order of the indices determines
the order in which the data referenced by the PDO's is transmitted.
1 PDO Group 0 is transmitted first
(PDO with the control and/or status data for the fieldbus coupler).
2 PDO Group 1 is transmitted next
(PDO's with data for the complex terminals).
3 PDO Group 2 is transmitted last
(PDO's with data for the binary terminals).
4 PDO 0x1701 and/or 0x1B01 with empty bits is transmitted at the end
(if necessary in order to achieve a 16 bit word alignment).
7.3.2

Alternative PDO Index Assignment

In some older masters, ambiguous design of the specification can cause PDOs
listed in the sync manager assignment lists to be sorted in ascending order in the
master according to their index. When this happens, the PDO's in the trans-
mission order no longer match the actual process images. This malfunction can
occur when using XML files, which only contain the description of the fieldbus
coupler and no descriptions for I/O modules.
To operate the EtherCAT
type, allocation of the indexes for the RxPDOs and TxPDOs can be configured
using object 0x2100 (PDO index assignment workaround for some masters).
More Information About Object 0x2100
Object 0x2100 is described in the "Object Dictionary" section à "Object 0x2100".

Table 36: Recommendations for Setting the 0x2100:01

Processing
PDO
Assignment
Lists in the
Master
®
Fieldbus Coupler when using defective masters of this
No XML file
available
FALSE
Correct
Linear
(workaround TRUE
needed)
Function Description
Value of object 0x2100:2
XML file with fieldbus XML file with fieldbus
coupler description coupler and I/O module
only
FALSE
TRUE
77
description
FALSE
FALSE
Manual
Version 1.2.1