Advertisement
4 Modbus Communications Procedure
4-5
Upload Settings and Download
Settings for Modbus
Communications
Introduction
If multiple parameters with consecutive addresses must be read or written through host
communications, you can read or write the specified number of parameters (elements) in one
operation. If the parameter addresses are not consecutive, they cannot be read or written in one
operation.
With the E5@D, you can use the upload settings and download settings that are used in Section 6
Programless Communications to treat any parameters as parameters with consecutive addresses to
improve host communications access and efficiency with Modbus communications.
Previous Communications
First read operation
Second read operation
Third read operation
Addresses of Parameters Allocated in Upload Settings and Download
Settings
You can allocate 13 parameters in the upload settings and 13 parameters in the download settings.
For details on addresses, refer to Upload Settings 1 to 13 and Download Settings 1 to 13 on page
5-7.
Default Settings and Set Values of Parameters Allocated in Upload Settings
and Download Settings
The default settings and set values for the parameters that are allocated with the upload settings
and download settings are the same as those in Section 6 Programless Communications.
For details, refer to 6-2-9 Upload Settings and Download Settings (pages 6-12 and 6-13).
Note: The default setting of the Upload Setting 1 parameter, Communications Monitor, can be used only with
programless communications, so the setting is disabled for Modbus communications.
Additional Information
4-4-1 Variable Read, Multiple on page 4-8
4-4-2 Variable Write, Multiple on page 4-10
4 - 16
Communications with Upload Settings and Download
XXX0
Parameter A
XXX1
Parameter B
(three elements specified)
XXX2
Parameter C
XXX3
Parameter D
XXX4
Parameter E
XXX5
Parameter F
XXX6
Parameter G
XXX7
Parameter H
E5@D Digital Temperature Controllers Communications Manual (H225)
Settings
One read operation
3A00
3A01
3A02
3A03
3A04
3A05
3A06
3A07
Parameter B
Parameter E
Parameter G
Parameter
Parameter
Parameter
Parameter
Parameter
Advertisement
