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dS1242

dS1242 User Manual v4.10

Binary Command Set – continued.

0x35 Get Analogue inputs (1 byte command returning 4 bytes)

This returns all 2 possible analogue inputs. 4 bytes are returned, 2 for each analogue input.

Byte 1 byte 2 for example:

0x02 0x3E combined to 0x023E, or 574 decimal for input 1.

Byte 3 byte 4

0x01 0xFB combined to 0x01FB, or 507 decimal for input 2.

0x36 0x01 Get Counters (2 byte command – returning 8 bytes)

This command is used to get the counters. The second byte is the counter number, counter 1

in this case.

The first 4 bytes returned is the current counter value. This 32-bit (4 bytes) value is returned

high byte first. The second group of 4 bytes returned is the capture register for this counter,

also a 32-bit (4 byte) value returned high byte first.

0x37 0xnn 0xnn 0xnn 0xnn Update all relays (5 byte command returning 1 byte)

This command is used to update all relays with one command returning an ACK/NACK byte.

ACK=0, NACK=non-zero. If a bit is high (1), the corresponding relay will be turned on. If a bit

is low (0) the corresponding relay will be turned off. This command therefore affects all relays.

The bit order is the same as the Get Relay command.

Byte 2 Byte 3 Byte 4 Byte 5

7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0

32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1

0x38 0xnn 0xnn 0xnn 0xnn Set selected relays (5 byte command returning 1 byte)

Set only those relays with a corresponding high in the bit pattern returning an ACK/NACK byte.

ACK=0, NACK=non-zero. Same bit order as command 0x37 above.

Relays with a corresponding low (0) are NOT affected and remain on/off as previously set.

0x39 0xnn 0xnn 0xnn 0xnn Clear selected relays (5 byte command returning 1 byte)

Clears only those relays with a corresponding high in the bit pattern returning an ACK/NACK

byte. ACK=0, NACK=non-zero. Same bit order as command 0x37 above.

Relays with a corresponding low (0) are NOT affected and remain on/off as previously set.

Devantech dS1242 User Manual

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