Despatch Protocol 3 Modbus Communications - Manual (Page 43)

Modbus Programming Manual A DDRESS LIST
Version 2 43
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Segment Type Segment Info Description
A B
1 = Time of day Start Time Wait until time of the day “B” in seconds since
midnight.
Loop Number of times to
repeat 1 to 9999 Segment number Loop to the specified segment number “B” from this
point. Repeat this “A” times. Only segments below the
current segment can be entered. Two loops must not
cross each other.
Join Null Profile number On completion of this profile jump run profile “B”
End 0 = Control off Null Turn off all control outputs.
1 = Maintain profile
setpoint Null Stay at the final setpoint of the profile
2 = Control off with
events Null Turn off the outputs but maintain the events.
Repeat
Sequence Then
End 0 = Outputs off Number of times to
repeat sequence Repeat the profile sequence number “B” times, then
turn off the control outputs
1 = Maintain profile
setpoint Repeat the profile sequence number “B” times, then
hold the last profile setpoint.
2 = Control off with
events Turn off the outputs but maintain the events.
2.9.5.6. Deleting Profiles (Command Code DP and DA)
An individual profile can be deleted, or all profiles can be cleared with a single message.
Deleting a profile removes the header of the specified profile and any segments associated with it.
Delete all profiles wipes all profiles and segments from the instrument.
Delete Profiles - Request (to instrument)
Field Name Data Comments
(Dec) (Hex)
Unit Address A/R A/R The ID address of the instrument.
Function Code 23 17 Requires the multi read/write function
Read Start Address High Byte 32 20
Read Start Address Low Byte 06 06
Read Quantity Of Registers High 00 00
Read Quantity Of Registers Low 01 01
Write Start Address High 32 20
Write Start Address Low 06 06
Write Quantity Of Registers High 00 00
Write Quantity Of Registers Low 02 or 01 02 or 01 Delete A Profile (DP) = 02dec / 0x02hex
Delete All Profiles (DA) = 01dec / 0x01hex
Byte Count 04 or 02 04 or 02 Delete A Profile (DP) = 04dec / 0x04hex
Delete All Profiles (DA) = 02dec / 0x02hex
Command Code High Byte 68 44 Delete A Profile (DP) = 17488dec /
0x4450hex
Delete All Profiles (DA) = 17473dec /
0x4441hex
Command Code Low Byte 80 or 65 50 or 41
Profile Number High Byte A/R A/R Note: The profile number is not included
in the message when deleting all profiles.
Profile Number Low Byte A/R A/R
CRC High Byte A/R A/R
CRC Low Byte A/R A/R
The instrument replies to this message with an Edit Response Message Section 2.9.5.9.