Multi-Drop Mode - Pepperl+Fuchs IUH-F190-V1-FR2-12 Manual

IUH-F190-V1-*, IUT-F190-R4-V1*
Operation
The command must be executed after a configure interface CI or define function DF, so that the
changes become active.
Configuration Commands
See chapter 6.6 and chapter 6.5
Read/Write Commands
See chapter 6.4
6.7.2

Multi-drop mode

In this operating mode, the read/write head immediately sends a confirmation that the com-
mand has been understood. The read/write head then starts to execute the command. The
actual result of the command must be queried by polling the write/read head. The get data GD
command is used for this.
Note
In multi-drop mode, the device address must be specified in each command.
In multi-drop mode, the command syntax differs from the syntax of the read/write heads with
the IDENTControl control interface through the addition of device address <DeviceNo> instead
of the channel number <ChanNo>.
Example
Command: <CommandCode> <DeviceNo> <CommandParameters> <CHCK> <ETX>
Response: <Status> <DeviceNo> <Data> <CHCK> <ETX>
You also have the option of replacing <CHCK><ETX> with #<CR>.
A new command can be sent only after a response to the previous command has been
received.
System Commands
Get Device Address GA
This command reads the device address of a read/write station.
Command:
Response:
Set Device Address SD
This command changes the device address in multidrop mode from <OldDeviceNo> to
<NewDeviceNo>. The default device address is "FF".
Command:
Response:
Configure Interface CI
This command configures the timeout and the baud rate. The values are stored in the nonvola-
tile memory. Any modifications become active only after a reset has been performed. The time-
out is the time after which the read/write head no longer waits for characters in a command.
After the timeout expires, the user receives an error message. To deactivate the timeout, the
time must be set to "0".
The number of data bits is always 8. A parity bit is not used.
GA <CHCK> <ETX>
<Status> <DeviceNo> <DeviceNo> <CHCK> <ETX>
SD <OldDeviceNo> <NewDeviceNo> <CHCK> <ETX>
<Status> <DeviceNo> <CHCK> <ETX>
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