
27
DeviceNet Explicit Messages Set Values and Measurement
Section 4-4
4-4-2
Reading/Writing using Variable Type 90
The table for variable type 90 shows that the addresses are not continuous
when the type of set value or measurement value changes. Groups of set val-
ues and measurement values that are not in consecutive addresses and
include different types of data, however, can be read or written together.
Example: To read the data from the proportional band of control point 0 to the
derivative time of control point 7 in one operation, set the data elements as
shown here. The data for the addresses in between will also be read
First read address:
0044 (hex) (control point 0 proportional band address)
Number of elements:0018 (hex) (24 elements)
If, however, there are write
-
only set values within the range to be read in suc-
cession, or read
-
only set values and measurement values within the range to
be written, an error will occur.
The limit on the number of set values for which communications can be per-
formed at one time varies depending on the Master Unit being used. Refer to
the DeviceNet (CompoBus/D) Operation Manual (Cat. No. W267) or the
CS1W
-
DRM21 DeviceNet Unit Operation Manual (Cat. No. W380) for details
on set value limitations.
4-4-3
Operation Variables
The following table shows the variable types that are used for operating the
E5ZE. If the set value is also in the table for variable type 90, either variable
type can be used to change values.
Variable Type: 83
Note
1.
The Temperature Control Start Command cannot be executed while auto
-
tuning is being executed.
2.
The Auto
-
tuning Start Command cannot be executed while operation is
stopped or the Unit is being manually operated.
3.
The Manual Operation Start Command cannot be executed while auto
-
tun-
ing is being executed.
4.
The Initializing Setting Data Command can be executed only when the Unit
is stopped.
Address
Set value
Data setting or monitoring range
Data type
0002
Auto
-
tuning Start
(See note 2.)
Range: 0001 to 00FF
Status
Write only
0003
Auto
-
tuning Stop
0004
Manual Operation Start
(See notes 3 and 6.)
0005
Write Set Values
0001
0006
Initialize Set Values
(See notes 4 and 5.)
Operation Command Data Contents
Leftmost bit
Rightmost bit
Set to 00000000.
When the bit corresponding to the control
point to be operated is set to 1, writing will
start.