Curtis 1352 handleiding
Handleiding
Je bekijkt pagina 24 van 40
5 — SDO COMMUNICATIONS
Curtis 1352 eXm Manual, June 2021
Return to TOC
pg. 20
SDO eXm RESPONSE, SDO-TX
An SDO request is always acknowledged with a response message from the eXm. e eXm can issue
two kinds of response messages: a normal response or, in case of an error in the request SDO, an
Abort SDO Transfer message.
SDO-TX (sent by the eXm in response to the system manager)
Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7 Byte 8
Control CAN Object Index Sub-index
Data: either the requested Read values, or the
actual Write values, or an error code
e rst data byte of the response contains an acknowledge code, which depends on the type of
transfer that was initially requested.
Action Byte 1 Value
Read Response 40h
Write Acknowledge 60h
Abort SDO 80h
Data bytes 2, 3, and 4 hold the CAN Object index and sub-index of the request SDO.
If the SDO was a read command (a request for data from the eXm), data bytes 5 through 8 will
be lled with the requested values, with the least signicant byte is data byte 5 and the next least
signicant in byte 6 and so forth. All unused bytes are set to 0.
If the SDO was a write command, data bytes 5 through 8 will return back the actual value written in
bytes 5 – 8. In this way, if the eXm needs to limit or round-down the SDO write request, the manager
will know—because the return value will be dierent than the sent value.
If the SDO-RX did not properly read or tried to access a parameter improperly, an Abort SDO
Transfer will be sent. Data bytes 5 through 8 will be lled with a 32-bit error code.
06020000h = Object does not exist
06010002h = Attempt to write to a read only object.
TYPES OF SDO OBJECTS
ree types of SDO objects are described in the following pages: Communications Prole Objects
(address range 1000h), Device Parameter Objects (address range 3000h), and Device Monitor Objects
(address range 3100h).
Bekijk gratis de handleiding van Curtis 1352, stel vragen en lees de antwoorden op veelvoorkomende problemen, of gebruik onze assistent om sneller informatie in de handleiding te vinden of uitleg te krijgen over specifieke functies.
Productinformatie
| Merk | Curtis |
| Model | 1352 |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 5176 MB |
