14
Writing Set Points
Section 3-5
The time required for DeviceNet communications to be enabled will depend
on the order in which power is supplied, the number of Slaves connected to
the Master, the baud rate, and other variables.
3-4-2
Manual Operation
When the E5ZE
-
8
@@@
D1
@
B
-
V2 Multipoint Temperature Controller is being
operated manually, the following procedure is required depending on the rela-
tionship to the remote I/O Temperature Control Start/Stop Bit.
Refer to page 28 for details on the relationship between remote I/O and the
E5ZE operating status.
Starting Manual Operation
1,2,3...
1.
Set the Temperature Control Start/Stop Bit to 1 for the control point to be
manually operated and temperature control will start for the control point.
2.
Execute the Manual Operation Start command using DeviceNet explicit
message communications or through the RS
-
232C auxiliary setting jack.
Manual operation will start.
3.
Set the manual output using DeviceNet explicit message communications
or through the RS
-
232C auxiliary setting jack.
Stopping Manual Operation
Set the Temperature Control Start/Stop Bit to 0 for the control point being
manually operated and temperature control will stop for the specified control
point. Temperature control can then be restarted by setting the bit to 1 again.
3-5
Writing Set Points
The set point for each control point is written as 16
-
bit signed binary data
(two
’
s complement for negative values) in the corresponding word in the PC
to which the Master Unit is mounted. The value is automatically transmitted to
the E5ZE. The data will be written according to the setting unit that is set in
the E5ZE. The default value is 1
°
C/
°
F for thermocouples and 0.1
°
C/
°
F for plat-
inum resistance thermometers.
Example
If the set point is to be set to -90.0
°
C, and the setting unit is 0.1
°
C, the value
set in the corresponding word will be as follows:
Set Point
Decimal
Hexadecimal
Binary
-90.0
°
C
-900
FC7C
1111110001111100
If the set point is to be set to 110.0
°
C, and the setting unit is 0.1
°
C, the value
set in the corresponding word will be as follows:
Set Point
Decimal
Hexadecimal
Binary
110.0
°
C
1100
044C
0000010001001100
If the set point is to be set to 110.0
°
C, and the setting unit is 1
°
C, the value set
in the corresponding word will be as follows:
Set Point
Decimal
Hexadecimal
Binary
110.0
°
C
110
006E
0000000001101110
Refer to page 25 for details on the permissible setting ranges.
Leftmost bit
Rightmost bit