INTERFACE SPECIFICATIONS
ALARM STATUS SENSE(D5)
The external and video loss alarm states are indicated by a
RXD | D5 |
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TXD |
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| d2 |
| d3 |
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| d5 |
| d6 |
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ALARM STATUS SENSE(D5) byte assignment (Table 2)
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)
First byte
Bit
7ALARM ON 8
6ALARM ON 7
5ALARM ON 6
4ALARM ON 5
3ALARM ON 4
2ALARM ON 3
1ALARM ON 2
0ALARM ON 1
Second byte
Bit
7ALARM ON 16
6ALARM ON 15
5ALARM ON 14
4ALARM ON 13
3ALARM ON 12
2ALARM ON 11
1ALARM ON 10
0ALARM ON 9
When there is an alarm, this command is sent as header. Then, the alarm information is sent in a
ALARM information (Table 3)
Bit |
| Bit state information |
7 | Alarm information | 00: No alarm |
| indication |
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6 | 01: External | |
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| 10: Video loss |
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| 11: Sensor alarm |
5 | Reserved | 0 |
Third byte
Bit
7SENSOR 8
6SENSOR 7
5SENSOR 6
4SENSOR 5
3SENSOR 4
2SENSOR 3
1SENSOR 2
0SENSOR 1
Fifth byte
Bit
7VIDEO LOSS 8
6VIDEO LOSS 7
5VIDEO LOSS 6
4VIDEO LOSS 5
3VIDEO LOSS 4
2VIDEO LOSS 3
1VIDEO LOSS 2
0VIDEO LOSS 1
Fourth byte
Bit
7SENSOR 16
6SENSOR 15
5SENSOR 14
4SENSOR 13
3SENSOR 12
2SENSOR 11
1SENSOR 10
0SENSOR 9
Sixth byte
Bit
7VIDEO LOSS 16
6VIDEO LOSS 15
5VIDEO LOSS 14
4VIDEO LOSS 13
3VIDEO LOSS 12
2VIDEO LOSS 11
1VIDEO LOSS 10
0VIDEO LOSS 9
4 | Reserved | 0 |
3 | Camera number | 0000: CAMERA NO. 1 |
2 | indication | 0001: CAMERA NO. 2 |
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1 |
| 0010: CAMERA NO. 3 |
0 |
| 0011: CAMERA NO. 4 |
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| 0100: CAMERA NO. 5 |
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| 0101: CAMERA NO. 6 |
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| 0110: CAMERA NO. 7 |
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| 0111: CAMERA NO. 8 |
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| 1000: CAMERA NO. 9 |
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| 1001: CAMERA NO. 10 |
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| 1010: CAMERA NO. 11 |
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| 1011: CAMERA NO. 12 |
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| 1100: CAMERA NO. 13 |
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| 1101: CAMERA NO. 14 |
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| 1110: CAMERA NO. 15 |
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| 1111: CAMERA NO. 16 |
English | 51 |