Communications Commands; Modbus Commands; D.3 Communications Commands - Emerson DL8000 Instruction Manual

D.3 Communications Commands

D.3.1 Modbus Commands
Revised February-2016
This section details all commands the Modbus and DanLoad 6000
protocols support.
You use Modbus commands when using the register-mapped Modbus
protocol. Table D-1 lists the executable commands available in the
Modbus protocol. These commands are called "executables" since they
force the DL8000 to perform certain kind of activities. The table also
specifies the operation mode in which each command is valid.
Table D-1. Modbus Executable Commands
Cmd No Cmd No
(decimal) (hex)
1 1
3 3
5 5
6 6
7 7
8 8
10 A
13 D
14 E
15 F
19 13
20 14
28 1C
41 29
48 30
55 37
56 38
61 3D
The following sections describe all the commands supported in the
Modbus protocol, including the supporting parameters required for the
execution of each command, status flags changed during each
command, and exceptions checked.
When using Modbus, you use function codes to write the data for
respective parameters required for the execution of commands in
advance before issuing the command to the DL8000. Refer to the
Communications Protocols
DL8000 Preset Instruction Manual
Command Name
Prompt Recipe
Prompt Additives
Timeout Operation
Authorize Transaction
End Transaction
Prompt Preset Volume
Authorize Batch
End Batch
Start/Restart Batch
Stop Batch
Clear Status
Reset Primary Alarms
Display Message
Set Date and Time
Reset Unit
Change Operating Mode
Clear Display
Report Alarm
Operating modes
[Auto/Manual]
Auto
Auto
Auto
Auto
Auto
Auto
Auto
Auto
Auto
Auto
Auto
Auto
Auto
Auto/Manual
Auto/Manual
Auto/Manual
Auto
Auto/Manual
D-15