ProSoft Technology MVI69-101S - Manual (Page 46)

MVI69-101S ♦ CompactLogix or MicroLogix Platform Ladder Logic
IEC 60870-5-101 Slave Communication Module
Page 46 of 149 ProSoft Technology, Inc.
March 16, 2009
Name Data Type Description
ReadData INT[480] Read buffer where data is initially
copied from the 101S (command) data
types and then copied from the buffer
to the module
WriteData INT[480] Write buffer where (monitored) data is
initially copied from the module and
then parsed to one of the 101S data
types
M_SP_NA BOOL[32] Monitored Single Points
M_DP_NA INT[10] Monitored Double Points
M_ST_NA SINT[10] Monitored Step-Points
M_ME_NA INT[10] Monitored Normalized Measured
Points
M_ME_NB INT[10] Monitored Scaled Measured Points
M_ME_NC REAL[10] Monitored Floating Point Measured
Points
M_IT_NA DINT[10] Monitored Integrated Total
C_SC_NA BOOL[32] Controlled (Command) Single Point
C_DC_NA INT[10] Controlled (Command) Double Point
C_RC_NA SINT[10] Controlled (Command) Step point
C_SE_NA INT[10] Controlled (Command) Set-point
Normalized value
C_SE_NB INT[10] Controlled (Command) Set-Point
Scaled Value
C_SE_NC REAL[10] Controlled (Command) Set-Point Short
Floating Point Number
The read data (ReadData) is an array set to match the value entered in the Read
Register Count parameter of the 101S.CFG file. For ease of use, this array
should be dimensioned as an even increment of the value configured through the
block transfer size parameter (60, 120 or 240 words). This data is paged up to
60, 120 or 240 words at a time from the module to the processor. The ReadData
task places the data received into the proper position in the read data array. The
ReadData array contains the control points received from the controlling station.
The write data (WriteData) is an array set to match the value entered in the
Write Register Count parameter of the 101S.CFG file. For ease of use, this
array should be dimensioned as an even increment of the value configured
through the block transfer size parameter (60, 120 or 240 words). This data is
paged up to 60, 120 or 240 words at a time from the processor to the module.
The WriteData task places the write data into the output image for transfer to the
module. The WriteData array contains the monitor points to be sent to the
controlling station.