W
ATLOW
®
EZ-ZONE
®
RMZ4
-
55
-
E
THER
CAT
®
A
DAPTER
10
E
THER
CAT®
P
ROTOCOL
The EtherCAT® implementation supports CoE (CANOpen over EtherCAT®) and FoE (File over EtherCAT®). CoE
defines the mapping of device parameters to Indexes and Sub Indexes. FoE is used to write new application
code into the product for revision upgrades.
10.1
D
EVICE
O
BJECTS
Each system object type is mapped to an Index. In the Watlow EtherCAT® Adapter, objects are structured as
arrays of objects representing each control loop separated by 0x10. The Sub Indexes within each index are the
individual parameters that comprise the objects. EtherCAT® indexes are mapped to class instances using the
Modular Device topology. Input data for loop 1 is located at index 0x6000. Input data for loop 2 in located at
index 0x6010, etc. Items in the 0x200, 0x3000, 0x6000 and 0x7000 parameters can be mapped to the PDO
sets.
Index
Description
Details
Modular
0x1000 Identity Object
Device Name, Vendor ID, serial number…
No
0x2000 Watlow Specific Input Data
Limit sensor
Yes
0x3000 Watlow Specific Output Data
SP, Desired States…
Yes
0x4000 Watlow Specific I/O Mapping
TC Types, Ranges, Alarm Points…
Yes
0x4001 Watlow Specific Configuration
Cooling, Limits and CT parameters
Yes
0x5F00 Alarm Grouping
Aggregates Alarms
No
0x6000 Input Data
PV, Errors, Actual States, Current…
Yes
0x7000 Output Data
SP, Desired States…
Yes
0x8000 Configuration Parameters
TC Types, Ranges, Alarm Points…
Yes
0xF000 Device Specifics
Number of Modules, Module Index Offset…
No
0xF300 Exceptions
Exceptions and fault indication
No
0xF500 Watlow Attached Devices
RM and ST details
No
0xF600 Input Status
Status of PDO updates
No
0xF900 Information
Which features are present, generation of specs
No
0xFA00 Diagnostic Messages
Event log and EtherCAT® issue log
No
0xFB00 Commands
Start Autotune, Store parameters, Reset device
No
Loops are mapped to repeating indexes with an offset of 0x0010 between Modular Object indexes.
A standard listing of objects is available in the Semi SDP ETG.5003.2060 from the EtherCAT website.
http://www.ethercat.org
The complete list of SDP and Watlow Specific objects is available from the Watlow website as an Excel
spreadsheet.
http://www.watlow.com
Search “Watlow EtherCAT SDP”