Sartorius X3 PR 5410, Руководство по эксплуатации, Страница: 128 / 148

Fieldbus Interface X3 Operating Manual
128 Sartorius
7.2.3 Reading and Writing Register via Fieldbus
7.2.3.1 Reading Data: Read_Value, Read_Value_Select, Read_Value_Selected
When the master has to read from the instrument, the register number is transmitted in
Read_Value_Select
in the input area. The result is specified with
Read_Value_Selected in the output area
.
Action of the master Response of PR 5410
Writing register no. in
Read_Value_Select
Writing the selected register in
Read_Value
Copying Read_Value_Select
into
Read_Value_Selected
Waiting, until
Read_Value_Selected = Read_Value_Select
Reading Read_Value
7.2.3.2 Writing data: Write_Value, Write_Value_Select, Write_Active
When the master has to write into the instrument, the required action is transmitted into the input area with
Write_Value_Select
together with the data. Execution is indicated by bit
Write_Active
in the output area.
Action of the master Response of PR 5410
Writing value in
Write_Value
Writing the register number in
Write_Value_Select
Writing Write_Value
in the selected register
Setting bit
Write_Active
Waiting, until
Write_Active
was set
Writing 0 in
Write_Value_Select
Resetting bit
Write_Active
7.2.3.3 Setting Bit: Action_Select, Write_Active
Single bits can be set or reset directly with
Write_Value_Select
.
For setting, the bit number (80.. 127) is written in
Write_Value_Select
.
For resetting, the bit 128 (208..255) is written in
Write_Value_Select
.
Action of the master Response of PR 5410
Writing register number in
Write_Value_Select
Writing Write_Value
in the selected register
Setting the
Write_Active bit
Waiting, until
Write_Active was set
.
Writing 0 in
Write_Value_Select
Resetting the
Write_Active bit
7.2.3.4 Reading Bit
Single bits can be read only by reading a register. The procedure is described in Chapter 7.2.3.1.