Emerson PACSystems Versamax - Datagram Types; Read Map

PACSystems VersaMax Genius Network Interface User Manual Section 5
GFK-1535D Jan 2023
Configuration 83
5.1 Datagram Types
The table below shows the primary datagrams that may be acted upon by
the NIU.
Datagram Type
Subfunction
Code
(hexadecimal)
Network Interface Unit
Action
Read Identification
00
send Read ID Reply
Read Configuration
02
send Read Configuration Reply
Write Configuration
04
process (possibly send configuration
changes)
Assign Monitor
05
process
Begin Packet Sequence
06
start sequence
End Packet Sequence
07
end/check sequence
Read Diagnostics
08
send Read Diagnostics Reply
Clear All Faults
13
process
Set Baud Rate
14
process (send Set Baud Rate Reply)
Set Serial Bus Address
(SBA)
16
process
Set Status Table Address
17
process
Force I/O
18
process
Unforce I/O
19
process
Force BSM *
1A
process (send config. change)
Unforce BSM *
1B
process (send config. Change when the last
point is unforced)
Switch BSM *
1C
process
Configuration Protect
23
process
Configuration Unprotect
24
process
Read Map
2A
send Read Map Reply
Set Operating Mode
39
process
Read Operating Mode
44
send Read Operating Mode Reply
* These datagrams cannot be used when the Genius NIU is configured for Enhanced
Diagnostics mode.
5.2 Read Map
Subfunction Code: 2A hex
This datagram is used to read the reference addresses and lengths that
have been configured for the NIU's network I/O map.
Data Field Format: none