Baumer GK473 - Manual (Page 17)

Manual_GK473_DeviceNet_EN.doc 17/31 Baumer IVO GmbH & Co. KG
04.05.11 Villingen-Schwenningen, Germany
7.2 Attribute 2: Transparent transfer of a SPA command
Class Instance Attribute Access Rule
Name DeviceNet
Data type Default
Value
100 1 2
Transparent
Transfer
Service Code
0x32
(Vendorspecific)
Transparent transfer of SPA command
ARRAY[16]
of USINT
This object is for transparent transfer of all commands to the spindle position displays (SPA) utilizing the
vendor specific service Code 0x32.
Basically there is a transparent transfer of all commands under codes „A“...“z“ from DeviceNet Master to SPA
and vice-versa what enables addressing the SPAs individually or collectively by broadcast command. The
gateway does not verify whether a registered SPA is connected or not, neither the command code is verified.
The gateway replies to every command received by the DeviceNet-Master (PLC).
Response is by
• transparent transfer of the SPA reply, if an individual SPA was addressed and duly replied
• an abort message if the addressed SPA did not reply within the timeout window (approx. 100 ms)
Any timeout administered by the DeviceNet Master for monitoring of gateway reply should not be less than
400 ms.
The DeviceNet Master transmits to GK473 the transmission data within the limits SOH and EOT out of the
complete command to the addressed spindle position display (SPA). Length is always 16 bytes since digits
not utilized are filled up with 0.
Example: Programming the target (profile no = 17; target = -12,50; SPA identifier 0)
SOH Adr Cmd Profile no. = 17 Target = -12,50 EOT CRC
Transmission
01h 20h 53h 31h 37h 2Dh 30h 31h 32h 35h 30h 04h FBh
In the other direction (responding SPA) start and stop token as well as CRC byte are taken out of the RS485
message which in its remaining content is transferred unchanged into the data block of a DeviceNet message
so that it will be available at the PLC as consistent input data.
Example: Programming the target (profile no = 17; target = -12,50; SPA identifier 0)
SOH Adr Cmd Profile no. = 17 Target = -12,50 EOT CRC
Response
01h 20h 53h 31h 37h 2Dh 30h 31h 32h 35h 30h 04h FBh
For details regarding content and format of SPA commands please refer to the respective user
manual.