Revision: 0
15
Technical specifications are subject to be changed without notice
If none of the cases a) or b) is fulfilled the message will also be transmitted on the MIDI. Then if any unit on the MIDI ring
recognizes any of the cases a)/b) or c), the message will stop at that point. This means that the message will only be returned
once on the RS232.
However, if none of the units on the MIDI ring recognizes any of the cases a) to c), the message will return to the originator
(the unit which received the message on RS232). This unit will re-transmit the message once more on both MIDI and RS232.
The message is therefore returned a second time on RS232. This time one of the cases a) or c) is sure to be identified by one
of the units on the MIDI ring, and the message is removed.
There is however one more special case: If several messages for unused addresses are transmitted with only little delay, one
might experience that some messages are returned several times, as the store/compare/remove function in case c) can only
handle a single message at the time. We therefore recommend that the user avoid sending messages to unused addresses.
7.3. RS232
The RS-232 port is used for external control of Network units. The RS-232 port allows the customer to control the equipment
via Miranda's i-Control PC program or self-defined customized solutions.
Connector for the RS-232 port is a DS9 female.
Pin 2 - Tx.
Pin 3 - Rx
Pin 5 - GND
A standard DCE (Data Communication Equipment) cable can be used for connection between PC and Network equipment.
The connection between the connectors is made one-to-one.
Data-rate is 19200 baud/sec for all 32x32 units.
8 data-bit, 1 stop-bit, no parity.
7.4. MIDI
The MIDI bus is used for interconnection between several Network units. Up to 50 routers and/or control panels can be
linked together to form a routing system with many operational features.
The MIDI bus utilises a 5 mA current loop with opto coupled ports.
Standard connector is a 5pin DIN.
Standard MIDI cables can be used to interconnect several Network units.
Data-rate is 31.25 kbit/sec.
1 start-bit, 8 data-bit, no parity, 1 stop-bit. Logical 0 = current ON.
7.5. Commands
7.5.1.
Audio crosspoint set
Only for use with Audio routers.
Command for setting of crosspoints:
1001nnnn
0kkk kkkk
0vvv vvvv
- nnnn is the matrix address from 0 up to 15.
- kkk kkkk is the output which shall be controlled.
kkk kkkk = output number
0
=
output
1
127
=
output
128
- vvv vvvv is the input which shall be connected to the chosen output.
vvv
vvvv
=
input
number
