Sanyo MPX-CD92P Instruction Manual page 52

INTERFACE SPECIFICATIONS
ALARM STATUS SENSE(D5)
The external and video loss alarm states are indicated by a
6-byte response (see Table 2).
RXD
D5
TXD d1
ALARM STATUS SENSE(D5) byte assignment
(Table 2)
First byte
Bit
7 ALARM ON 8
6 ALARM ON 7
5 ALARM ON 6
4 ALARM ON 5
3 ALARM ON 4
2 ALARM ON 3
1 ALARM ON 2
0 ALARM ON 1
Third byte
Bit
7 SENSOR 8
6 SENSOR 7
5 SENSOR 6
4 SENSOR 5
3 SENSOR 4
2 SENSOR 3
1 SENSOR 2
0 SENSOR 1
Fifth byte
Bit
7 VIDEO LOSS 8
6 VIDEO LOSS 7
5 VIDEO LOSS 6
4 VIDEO LOSS 5
3 VIDEO LOSS 4
2 VIDEO LOSS 3
1 VIDEO LOSS 2
0 VIDEO LOSS 1
English
d2 d3 d4 d5 d6
Second byte
Bit
7
6
5
4
3
2
1
0 ALARM ON 9
Fourth byte
Bit
7
6
5
4
3
2
1
0 SENSOR 9
Sixth byte
Bit
7
6
5
4
3
2
1
0 VIDEO LOSS 9
COMMANDS AVAILABLE FROM THE
MULTIPLEXER
ACK(0A)
Response when this unit receives a command.
NAK(0B)
Response if this unit did not receive the command.
ALARM(BF)
When there is an alarm, this command is sent as header. Then,
the alarm information is sent in a 1-byte transmission (see Table
3).
ALARM information (Table 3)
Bit
7 Alarm information
indication
6
5 Reserved
4 Reserved
3 Camera number
indication
2
1
0
51
Bit state information
00: No alarm
01: External
10: Video loss
11: Sensor alarm
0
0
0000: CAMERA NO. 1
0001: CAMERA NO. 2
0010: CAMERA NO. 3
0011: CAMERA NO. 4
0100: CAMERA NO. 5
0101: CAMERA NO. 6
0110: CAMERA NO. 7
0111: CAMERA NO. 8
1000: CAMERA NO. 9