Network Router User Manual

GFK-1535A Chapter 5 Datagrams 5-7
5
Read Configuration Reply Data
Subfunction Code: 03 hex
This datagram is a reply to the Read Configuration datagram. Bytes 0-5 are like the
Read Configuration datagram above. Bytes 6-133 contain the module data, and are
like the Write Configuration datagram..
Read Configuration Data Format
Byte # Description
0 Rack Number (0,…, 7)
1, 2 Length (must match the length for the specific device whose configuration will be
written. Maximum=128)
3Slot (0,…, 9. Note that in datagrams, the slot numbering is different that the
number described elsewhere in the manual. In datagrams only: Power Supplies and
Carriers are “slot” 0
Network Interface Unit or
Expansion Receiver Module is “slot” 1)
Modules are “slots” 2-9
4, 5 Offset into slot configuration data
6 - 31 “Rack/slot” record for the slot
32 to end Context dependent data (optional)
Multiple byte fields in datagrams are transmitted in
little-endian format.
In this
format, the least significant byte of a word is stored in the lowest memory location
or transmitted first in time. The most significant byte follows.