ProSoft Technology MVI56-101S - Manual (Page 72)

Ladder Logic MVI56-101S ♦ ControlLogix Platform
User Manual IEC 60870-5-101 Slave Communication Module
Page 72 of 193 ProSoft Technology, Inc.
August 2, 2011
3.1 Module Data Object (ModuleDef870)
All data related to the MVI56-101S module is stored in a user defined data type.
An instance of the data type is required before the module can be used. This is
done by declaring a variable of the data type in the Controller Tags Edit Tags
dialog box.
The following table describes the structure of this object.
Name Data Type Description
InStat InStat870 Status information in each read block
ReadData INT[600] Data read from module
WriteData INT[600] Data to write to module
BP Backplane870S Data to handle backplane logic
ReadClock Clock870
WriteClock Clock870
CommandBits CommandsBits870S
PassEvents Event870[10]
EventCount INT
This object contains objects that define user and status data related to the
module. Each of these object types is discussed in the following topics of the
document.
3.1.1 Status Object (InStat870)
This object views the status of the module. The InStat870 object shown below is
updated each time a read block is received by the processor. Use this data to
monitor the state of the module at a "real-time rate".
Name Data Type Description
PassCnt INT Program cycle counter for module
Product INT[2] Product code for module
Rev INT[2] Revision level of module’s code
OP INT[2] Operating system version for module
Run INT[2] Run number for module
BlkErrs BlkStat870 Data block transfer statistics
Read INT Total number of blocks read by the module
Write INT Total number of blocks written by the module
Parse INT Total number of blocks parsed by the module
Err INT Total number of block transfer errors
Port_Select INT Current port on module being utilized
Bad_CRC INT Total number of frames with bad CRC errors
Sync_Err INT Total number of sync errors
Len_Err INT Total number length errors
Timeouts INT Total number timeout errors
RX_Frames INT Total number RX frames
TX_Frames INT Total number TX frames
Refer to the Reference chapter for a complete listing of the data stored in this
object.