Siemens SIMATIC S7-1200

Communication processor and Modbus TCP
13.3 Point-to-point (PtP) communication
S7-1200 Programmable controller
1132 System Manual, V4.2, 09/2016, A5E02486680-AK
Table 13- 38 Data types for the parameters
Parameter and type
Data type
Description
REQ IN Bool Activate the configuration change on the rising edge of this input.
(Default value: False)
PORT IN PORT After you install and configure a CM or CB communication device,
the port identifier appears in the parameter helper drop-list available
at the PORT box connection. The assigned CM or CB port value is
the device configuration property "hardware identifier". The port sym-
bolic name is assigned in the "System constants" tab of the PLC tag
table. (Default value: 0)
NDR
OUT
Bool
Indicates that new data is ready.
ERROR OUT Bool TRUE for one scan, after the last request was completed with an
error
STATUS
OUT
Word
Execution condition code (Default value: 0)
MODBUS_CRC*
OUT
Bool
MODBUS CRC generation and checking
DIAG_ALARM*
OUT
Bool
Diagnostic alarm generation
SUPPLY_VOLT*
OUT
Bool
Diagnostics for missing supply voltage L+ is available
*Get_Features returns TRUE (1) if the feature is available, FALSE (0) if the feature is not available
13.3.5.12
Set_Features
Table 13- 39 Set_Features (Set advanced features) instruction
LAD / FBD
SCL
Description
"Set_Features_DB"(
REQ:=_bool_in_,
PORT:=_word_in_,
EN_MODBUS_CRC:=_bool_in_,
EN_DIAG_ALARM:=_bool_in_,
EN_SUPPLY_VOLT:=_bool_in_,
DONE=>_bool_out_,
ERROR=>_bool_out_,
STATUS=>_word_out_);
Set_Features enables the ad-
vanced features that a module
supports.
1
STEP 7 automatically creates the DB when you insert the instruction.
Use the Set_Features instruction to read the advanced feature capabilites of a module.