Omega i-SERIES User Manual page 22

After modifying any settings with use of W prefix commands, a Hard Reset
command should be sent in order to load changes into Volatile memory.
Examples:
1. To reset the controller, send *Z02 (Table 5.3 & 5.4)
2. To read Setpoint 1, send *R01 (Table 5.3 & 5.4)
3. To change Setpoint 1 to 100.0, send *W012003E8 (see explanation below)
Description: SETPOINT.23~0 means 3 bytes x 8 bit positions
(2 hex. character in each byte)
Where 23~0 are 3 x 8 = 24 Binary bit positions
SETPOINT.23 =
0 = positive sign
1 = negative sign
For 100.0: Positive sign = 0, Decimal Point 2 = 010 Bin, Setpoint data 1000 = 3E8 Hex =
=001111101000 Bin
The command data = 0010 0000 0000 0011 1110 1000 Bin = 2003E8 Hex.
Send *W01 20 03E8
where:
*W01 - *<ccc> - write to Setpoint 1 (Table 5.2)
2003E8 - <data> - Setpoint data in hexadecimal format including sign and decimal
point (Table 5.2)
No spaces are allowed in the data string. The spaces shown on the above
example for illustration purpose only.
Decimal Point position for TC/RTD = 1 or 2, for PROCESS = 1, 2, 3, or 4
Decimal Point position for Set Point should be the same as Decimal Point
position sets for process value and can not be overwritten by SETPOINT
command (see RDGCNG command, described in 5.7.2).
4. To change Setpoint 1 to –100.0, send *W01A003E8 (see explanation below)
For (–100.0): Negative sign = 1, Decimal Point 2 = 010 Bin, Setpoint data
1000=3E8 Hex = 001111101000 Bin
The command data = 1010 0000 0000 0011 1110 1000 Bin = A003E8 Hex
Send *W01A003E8
5. To send the same as above for RS-485 with transmit address 01, the command is
Send *01W01A003E8.
SETPOINT.22~20 =
000 – Not Allowed
001 – Decimal Point 1 (FFFF.)
010 – Decimal Point 2 (FFF.F)
011 – Decimal Point 3*(FF.FF)
101 – Decimal Point 4*(F.FFF)
*Process only
2 0 0
A 0 0
3 E 8 Hex
3 E 8 Hex
18
SETPOINT.19~0 =
Setpoint data