ProSoft Technology 5201-DFNT-104C - Manual (Page 82)

Mailbox Feature (x201-DFNT-104C) 104C Version 3 ♦ ProLinx Gateway
Protocol Manual IEC 60870-5-104 Client (Firmware v3.xx)
Page 82 of 139 ProSoft Technology, Inc.
August 4, 2011
Mailbox Response
Word
Offset in
Block Data Field(s) Description
0 Mailbox ID This field contains the value of -9950 or 9950
identifying the block type to the module.
1 Number of
Commands
reported This field contains the number of commands
contained in the block that need to be
processed by the PLC. This field will have a
value of 1 to 60.
2 Start Index of First
Command This field contains the index in the command list
for the first value in the file. This field will have a
value of 0 to MaxCommands-1.
3 to 62 Command List
Errors Each word of this area contains the last error
value recorded for the command. The
command index of the first value (offset 4) is
specified in word 3 of the block. The number of
valid command errors in the block is set in word
2 of the block. Refer to the command error list
to interpret the error codes reported.
63 Mailbox ID This field contains the value of -9950 or 9950
identifying the block type to the module.