ADF Web HD674-A006, User Manual

Page: 22 / 47

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User Manual PROFINET / Modbus Master
Document code: MN674-A006_ENG Revision 1.000 Page 22 of 47
Page 22 of 47
M
ODBUS
W
RITE
The means of the fields are:
In the field “ Slave ID ” the address of
the Modbus device to write is defined;
In the field “ Type ” the data type of
the register to write is defined. The
following options are available:
o
Coil Status;
o
Holding Register;
In the field “ Address ” the starting
address of the register to write is
defined;
In the field “ NPoint ” the number of
consecutive registers to write is
defined;
In the field “ Poll Time ” the delay time between two Modbus requests is defined;
If the field “ On Change ” is checked, the converter sends the writing request only when the data from PROFINET change the value;
In the field “ Max Error ” the number of consecutive errors that the converter waits before suspending the poll until the next reboot is
defined. If it is set to ‘0’, this function is disabled;
In the field “ Position ” the address of the PROFINET array where taking the information is defined;
In the field “ Start Bit ” the bit of the selected byte of the field “Position” where starting to take the data is defined. Valid only for the
“Coil Status” type;
If the field “ Swap ” is checked, the bytes’ order is exchanged;
If the field “ Swap Word ” is checked, the words’ order is exchanged;
In the field “ Mnemonic ” the description for the request is defined.
Note:
In order to write the data only “On Change”, the “Poll Time” must be set to ‘0’.
Note:
If the field “On change” is checked and the “Poll Time” is different from 0, the converter sends the writing request cyclically and also
when the data is changed.
Figure 4b: “Set Access Modbus Write” window