ProSoft Technology MVI46-103M - Manual (Page 34)

MVI46-103M ♦ SLC Platform Module Configuration
IEC 60870-5-103 Master Communication Module
Page 34 of 187 ProSoft Technology, Inc.
September 12, 2006
Col Field Description
1 Enable
Code This field determines when the command will be executed according to the
following codes:
0=Command is disabled and will only execute if enabled from PLC
processor
1=Command will execute no more frequently than the time set in the Poll
interval
2=Command will execute when the last value read in the database differs
from the current value
6 Data Type This parameter sets the ASDU data type to be used with the message.
The codes specified are those defined for the IEC-870-5-103 protocol. The
following is a listing of command control data types supported in this
module:
Type Description
0 Special command
6 Time synchronization
7 General interrogation
20 General command (2 bit control)
The type 0 is not defined in the protocol specification but is added to the
module application to perform special commands. The command to be
issued is determined by the value of the function field. If the function is set
to 1, the module will issue a reset process command to the session
specified. If the function is set to 2, the module will a class 2 poll to the
selected session.
7 Function
Code This parameter specifies the function code as specified in the protocol
specification except when Data Type code 0 is used. For the general
commands, this field is used in conjunction with the Point Index to
determine the point to control in the remote slave device. For the special
commands, a value of 1 performs a reset process and 2 to issue a class 2
poll.
8 Point
Index This parameter along with the Function Code determines the point to
control in the remote device when the general command is utilized. For all
other commands this field is ignored.
9 Override
Flag This field is used with general commands to determine if the override or
database value should be used with the command. If the flag is set to 0,
the value in the module's database will be sent when the command is
issued. If the flag is set to 1 (or non-zero value), the value set in the
Override Value will be sent with the command. When the override flag and
value are utilized, the Enable Code 2 and Database Index can be used to
trigger the execution of the command.
10 Override
Value This parameter specifies the override value to use with the command if the
Override Flag is set. This value should have one of the following values:
1=Off and 2=On. Other values maybe valid for certain controlled
* The Point Index is the Data Information Number.
As an alternative to using a command list, blocks with an identification code of
9901 can be used to issue commands from the ladder logic.