| The memory address and station address are
set via dip switches on the board.
The device driver 'sa85.sys' must be installed with software
interrupt vector at 0x5b (/s5b) and /r2 option. See pages 31-35 of
Modicon Plus Network Programming Guide GM-MBPL-002 Rev. A. for more
information.
e.g. in config.sys
device=c:\sa85.sys /mc800 /r2 /s5b
Run the TSR 'dos_mp' from winstart.bat before starting up
windows.
| Boards
form
|
|
| Board name: |
User supplied unique
name
|
| Board type: |
MBPLUS |
| Address: |
0 Board number as in
/n option in 'sa85.sys'. Needed only if more than one board is
used |
| I/O Port: |
not used
|
| Interrupt: |
not used
|
| Special Opt: |
not used
|
| Ports
form
|
|
| Port name: |
User supplied unique
name
|
| Port number: |
not used
|
| Board name: |
Use the "Board
name" from the Boards form |
| Baud rate: |
not used
|
| Data bits: |
not used
|
| Stop bits: |
not used
|
| Parity: |
not used
|
| Special Opt: |
not used
|
| I/O Devices
form
|
|
| Name: |
User supplied unique
name
|
| Number: |
Network wide I/O
device number
|
| Address: |
Path to the PLC in the
form p.p.p.p.p
e.g. to PLC at node 1: 1
to PLC at node 2 through a bridge at node 5:
5,2 |
| Protocol: |
MBPLUS |
| Port name: |
Use the "Port
name" from the Ports form |
Note: For maximum performance a virtual port should be created
for each Modbus Plus unit. Up to eight ports may be defined per
board. Each port can have multiple Modbus Plus units.
Citect.ini option
[MBPLUS]
StringReverse = 0
Do not swab bytes in words of strings.
[Kernel]
MsClock = 0
To use the high resolution clock to improve performance set MsClock
to 1.
Standard citect.ini options
[MBPLUS]
MaxPending = 2
Block = 238 bytes
Retry = 0
Delay = 0
TimeOut = 2000 milliseconds
PollTime = 20 milliseconds
WatchTime = 30 seconds
Files
- SA85.SYS - Modbus Plus device driver from MODICON
- DOS_MP.EXE - Modbus Plus Driver DOS TSR
- MBPLUS.DLL - Modbus Plus Driver for windows
Modbus Variables
| Digital
|
|
|
00001
|
Output Coils 1 to
99999
|
|
|
10001
|
Input status 1 to
99999
|
| Integer/Long/Real/String
|
|
|
30001
|
Input registers 1 to
99999
|
|
|
40001
|
Output registers 1 to
99999
|
|
