4. Configuration
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Table 4-40. Parameters sEnumeratedStatus
Informs the data type of the received analog value.
INTEGER (0)
FLOAT (1)
Point operation value, integer format.
Point operation value, float format.
Table 4-41. Parameters sAnalogueValue
When true indicates that received command is pulsed.
This is time, in miliseconds, that the output must remain on.
This is time, in miliseconds, that the output must remain off.
Number of times the command must be executed.
Table 4-42. Parameters sPulseConfig
Table 4-43. Parameters sCancelParameters
To intercept commands to a specific point, first it is needto load in the dwVariableAddr parameter the
variable address correspondent to the point wanted to intercept the commands and then execute a
pulse in the bExec parameter. Once the command was recepted, the function block informs that a
command was intercepted through bCommandAvailable parameter. The intercepted command
information are then filled in the sCoomand and eStatus output parameters, according to the received
command type. This operation depends only of the received command type, don’t matter the
variable’s data type to which is being intercepted the command. The interception is finished and then
the function block can be released to intercept a new command when bDone parameter is true. Yet
must be pointed the command processing result in eCommandResult.
An application example of the commands intercepter, using ST language, that forwards a command
received by the Server IEC 60870-5-104 to a Nexto Series digital output double point , can be foun
at section Digital Output Double Points.
MODBUS RTU MASTER
This protocol is available for the Nexto Series CPUs in its serial channels. By selecting this option at
MasterTool IEC XE, the CPU becomes MODBUS communication master, allowing the access to
other devices with the same protocol, when it is in the execution mode (Run Mode).
There are two configuration modes for this protocol. One makes use of Direct Representation (% Q),
in which the variables are defined by its address. The other, called Symbolic Mapping has the
variables defined by its name:
Regardless of the configuration mode, the steps to insert a protocol instance and configure the serial
interface are the same. The procedure to insert a protocol instance is found in detail in the
MasterTool IEC XE User Manual - MU299609 or in the chapter Inserting a Protocol Instance. The
remaining configuration steps are described below for each mode.
ï‚· Add the MODBUS RTU Master Protocol instance to the serial channel COM 1 or COM 2 (or
both, in case of two communication networks). To execute this procedure, see Inserting a
Protocol Instance chapter.
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General