ProSoft Technology inRax MVI69-101M User Manual page 93

Reference
If too many events are present in the buffer (>200), the module will set the event
message overflow flag in the error/status data area of the normal read data
block. There is no response block to be received by the module from the
processor.
Command List Error Data Block (9950)
Block 9950 identification code requests the Command List Error Table from the
module for the 1000 user configurable commands. The format for the block is
shown in the following table:
Word Offset in Block
0
1
2
3 to n
where n = 60, 120, or 240 depending on the Block Transfer Size parameter (refer
to the configuration file).
The module will respond to a valid request with a block containing the requested
error information. The format for the block is shown in the following table:
Word Offset in Block
0
1
2
3
4 to 53
54 to n
where n = 60, 120, or 240 depending on the Block Transfer Size parameter (refer
to the configuration file).
ProSoft Technology, Inc.
February 4, 2008
MVI69-101M ♦ CompactLogix or MicroLogix Platform
IEC 60870-5-101 Master Communication Module
Data Field(s) Description
This field contains the value of 9950 identifying the
Block ID
block type to the module.
Number of This field contains the number of commands to
Commands to report in the response message. The value has a
report range of 1 to 200.
Start Index of This parameter sets the index in the command list
First Command where to start. The first command in the list has a
value of 0. The last index in the list has a value of
MaxCommands - 1.
Spare Not Used
Data Field(s) Description
Reserved Reserved (0)
Block ID This is the next block requested by the module.
Number of This field contains the number of commands
Commands contained in the block that must be processed by the
reported PLC. This field will have a value of 1 to 200.
Start Index of This field contains the index in the command list for
First Command the first value in the file. This field will have a value
of 0 to MaxCommands-1.
Command List Each word of this area contains the last error value
Errors 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.
Spare Not Used
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