User Manual Part 1

IS-900 User Guide Page 80 of 159

Bytes Explanation

1 Record type , '2'

2 Station Number. A hexadecimal number up to

3 Sub-Record type, 'O'

4-5 par1

6-7 par2

… CR, LF

For example, the default data list would be returned as:

'21O 2 4 1<>'

Station State Record This record is sent in response to an l{stationNum}<>

command. If the stationNum parameter is omitted the record

returns the state of the first four stations. This maintains

compatibility with the Fastrak protocol. If stationNum is

stated then byte 4 of the record will contain the state of the

requested station. Bytes 5, 6, and 7 will contain the state of

stations 2, 3, and 4. If stationNum is replaced with the ‘*’

wild-card character, then status for 32 stations is returned in

a single record.

Output of values are interpreted as 1 for ON and 0 for

OFF.

2{stationNum}l{stat1stat2stat3stat4}<>

Bytes Explanation

1 Record type , '2'

2 Station Number. 1, 2, 3, 4

3 Sub-Record type, 'l'

4 State of station stationNum, or station 1 if

omitted.

5 State of station 2.

6 State of station 3.

7 State of station 4.

8-35 (if ‘*’) Status of stations 5 to 32.

8,9 or 36,37 CR, LF

For example, if stations 1 and 3 are on:

l1<> command will return ‘21l1010<>’

l*<> command will return ‘21l10100000000000000000000000000000<>’