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Command "I": Calling for Information
Description: This request is about the identity number of the device and the version of the firmware.
Example:
The message sent from the
RCM
to the
RCS1
about the identity number is:
Message
<STX> <TYPE> <ADDRH> <ADDRL>
<Body>
<STATH>
<STATL
<CHKH>
<CHKL> <ETX>
m
0
1
I
1
7
Answer
<STX> <TYPE> <ADDRH> <ADDRL>
<Body>
<STATH>
<STATL
<CHKH>
<CHKL> <ETX>
m
0
1
I3187-01
7
8
5.3 Switch ing commands
The switching commands refer exclusively to the input and output involved. The
other input and the other output are not affected!
These messages are processed in a straight forward way. The control character
<STX>
and the
<TYPE>
field are passed on immediately. Each recipient analyzes the content of the
<TYPE>
field . If the type
does not match (e. g. the recipient is a member of the class d) the message is passed through.
Otherwise if the type does match, the
<ADDRH><ADDRL>
fields are evaluated.
Again, if the address does not match the message is passed through. But if the address does match, and
if the body contains a valid command and the checksum is correct, the command is executed, and the
RCS
sends an acknowledge to the
RCM
.
In case the body is not valid, the message is sent back to the
RCM
, and
EP
is added (
Error Protocol
).
In case the checksum is not correct, the message is sent back to the
RCM
, and
EC
is added (
Error
Checksum
)
5.3.1 Switchi ng the Digital Output 1
The
Digital Output 1
can be switched to the
Digital Input 2
or to the
Digital Input 1
.
In case there is a signal present on the desired input, the
target routing
will be the
actual routing
.
In case there is no signal present on the desired output, the
autoswitch
functionality determines the
routing: if enabled, the output is automatically routed to the other input, and the
actual routing
then
differs from the
target routing
. If disabled, the output will be non the less switched to the
target
input
and the projection module will be white (no picture, since there is no input signal).
In the status register, the correlated bits
output 1 target
/
output 1 true
(output 2 target / output 2 true)
can be compared to check the configuration.
On the device, the LEDs of the inputs indicate whether a signal is present or not, whereas the LEDs of
the outputs show which signal is routed (green: input 1, orange: input 2)
Содержание Hermes DXD
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Страница 13: ...2 Summary This chapter gives an overview of the HERMES DXD ...
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