GE Druck DPI 740 User Manual page 49

DPI 740 User Manual
The address 99 is a global address recognised by all
instruments.
As characters are received by the instrument they are instantly
echoed on to the next instrument unless the command block
character is a `#`. On receiving the termination characters the
received destination address is checked for the global address
99 or against the instrument's address. If this matches the
command is interpreted or the command is ignored.
Commands can be stringed together in a data packet. This
allows a more efficient data transfer as the destination and
source addresses do not have to be sent with each command.
example
#0099IC=PIU=0<CR><LF>
The command separator `;` can be used:
example
#0099IC=P;IU=0<CR><LF>
This command sent by instrument 99 to instrument 00 to set-
up input channel to measure pressure and select pressure
units of mbar.
Query facility
In addition to sending commands to instruments, data can be
queried by adding the ? character to the command.
example
#0099IC?<CR><LF>
This command interrogates instrument 00 for the parameter
on input channel 1.
Replies from the instruments follow a similar pattern except
the start indicator is different. Replies are echoed round the
network and not interpreted.
!ddssxx<CS><terminator>
The following reply sent from instrument 00 to instrument 99
indicates that the input channel is measuring pressure.
!9900IC=P
K0200 Issue No. 1
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