ProSoft Technology MVI46-103M - Manual (Page 24)

MVI46-103M ♦ SLC Platform Functional Overview
IEC 60870-5-103 Master Communication Module
Page 24 of 187 ProSoft Technology, Inc.
September 12, 2006
Word Offset Definitions Description
8 to 9 Value This double-word value contains the value for the
point index/function code in the event message. For
ASDU types 1 and 2, this value is only 2 bits wide.
For ASDU type 4, this double-word value contains
the floating-point number (short circuit location).
* Point Index refers to the Data Information Number
In order for this feature to be activated, the event pass-through parameter must
be set. When a master driver receives an event message from a controlled
station, it will build an event message corresponding to the event in the event
buffer of the module. This buffer is then sent to the processor when any
messages are present. Therefore, these blocks are sent to the processor on a
high priority. After the block is sent, the event message is removed from the
module's event buffer. The ladder logic should set register 4200 to a value of
zero after processing the event message data.
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 Data Field(s) Description
4100 Block ID This field contains the value of 9950 identifying the block
type to the module.
4101 Number of
Commands to
report This field contains the number of commands to report in the
response message. The value has a range of 1 to 60.
4102 Start Index of
First Command This parameter sets the index in the command list 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.
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 Data Field(s) Description
4100 Done Flag A value of zero will be placed in this register to indicate the
function is complete and the data is ready.
4101 Block ID This field contains the value of 9950 identifying the block
type to the PLC.
4102 Number of
Commands
reported This field contains the number of commands contained in
the block that must be processed by the PLC. This field will
have a value of 1 to 60.