151
Dead Band and Overlap Band Read: RD
Section 6-2
6-2
Dead Band and Overlap Band Read: RD
Function
This command is used to read the dead bands or overlap bands that have
been set at a control point.
Command
Response
1.
The response block for Dead Band and Overlap Band Read (RD) does not
include read data if the end code of the response block is other than 00.
2.
Refer to
2-4 End Codes
.
Communications Example
In this example, the E5ZE is operated with Dead Band and Overlap Band
Read (RD) under the following conditions.
Unit no.:
1
Memory Bank no.: 2
Control Point:
3
Overlap Band:
5
°
C
Command
Response
6-3
Cooling Coefficient Write: WC
Function
This command is used to write cooling coefficients that designate cooling
–
side proportional bands to a control point in heating and cooling control oper-
ation.
1.
The cooling
-
side proportional band to be set a control point is calculated
according to the cooling coefficient and proportional band. Refer to the fol-
lowing formula.
Cooling
-
side proportional band = Cooling coefficient x Proportional band
2.
Cooling Coefficient Write (WC) cannot be used at a control point being
auto
-
tuned.
@ R D 0 0
s
Control
point
Data code
Terminator
*
FCS
x16
x16
Unit
Bank
Header code
1
0
@ R D
s
Or minus
sign (-)
Terminator
*
Dead band or overlap band
FCS
x16
x16
Unit
Read data
Header code
End code
x16
x16
x10
x10
x10
x10
1
1
1
0
0
0
3
2
@ 0 1 R D 2 3 0 0 5 6
s
*
@ 0 1 R D 0 0 - 0 0 5 4 F
s
Normal end
-5
°
C (Overlap band)
*