ProSoft Technology 5205-104S-PDPS - Manual (Page 63)

Protocol Implementation 4205/5205-TS-104S-PDPS ♦ ProLinx Standalone
IEC-60870-5-104 to PDPS Communication Module with Time Stamp
ProSoft Technology, Inc. Page 63 of 128
July 12, 2007
Mailbox Commands
Start Stop Direction Description
100 101 PLC to GW Event Data
150 151 PLC to GW Database write transfer
160 161 GW to PLC Database read transfer
200 200 Both Set Time
201 201 Both Get Time
202 202 Both Get Event Buffer Counts
PLC = PROFIBUS master interface in PLC
GW = ProLinx Gateway
NOTES:
The block number for each device must be changed to trigger an operation.
The I/O data area is owned exclusively by only the PLC or GW.
A timeout must be implemented in the PLC in case the GW is not present.
Mailbox Structure
Mailbox From PLC to GW
Start Byte End Byte Description
0 0 Block number of data in block
1 1 Block number of data requested
2 198 Data for block
199 199 Block number of data in block
Mailbox From GW to PLC
Start Byte End Byte Description
0 0 Block number of data in block
1 1 Block number last requested by PLC
2 198 Data for block
199 199 Block number of data in block
Example Raw Database Exchange
Start Byte End Byte Description
0 0 150 (Raw data write)
1 1 160 (Raw data read)
2 3 Start register in database for write
4 5 Number of registers to write (1 to 94)
6 7 Start register in database for read
8 9 Number of registers to read (1 to 96)
10 197 Words to write to the database
198 198 Reserved
199 199 150 (Raw data write)