User manual
7
Alarm Outputs
There are up to two groups of alarm outputs and each group allows ten alarm types in the initial setting mode. The alarm output is activated whenever the process
temperature value (PV) is getting higher or lower than the set point of alarm limit.
Set
Value
Alarm Type Alarm Output Operation
0 Alarm function disabled Output OFF
1
Deviation upper- and lower-limit:
This alarm output operates when PV value is higher than the setting value SV+(AL-H) or lower than the setting value SV-(AL-L).
ON
OFF
SV-(AL-L)
SV
SV+(AL-
H
2
Deviation upper-limit:
This alarm output operates when PV value is higher than the setting value SV+(AL-H).
ON
OFF
SV
SV+(AL-H
3
Deviation lower-limit:
This alarm output operates when PV value is lower than the setting value SV-(AL-L).
ON
OFF
SV
SV-(AL-L)
4
Reverse deviation upper- and lower-limit:
This alarm output operates when PV value is in the range of the setting value SV+(AL-H) and SV-(AL-L).
ON
OFF
SV
SV-(AL-L)
SV+(AL-
H
5
Absolute value upper- and lower-limit:
This alarm output operates when PV value is higher than the setting value AL-H or lower than setting value AL-L.
ON
OFF
AL-L
AL-H
6
Absolute value upper-limit:
This alarm output operates when PV value is higher than the setting value AL-H.
ON
OFF
AL-H
7
Absolute value lower-limit:
This alarm output operates when PV value is lower than the setting value AL-L.
ON
OFF
AL-L
8
Deviation upper- and lower-limit with standby sequence:
This alarm output operates when PV value reaches set value (SV value) and the value is higher than the setting value SV+(AL-
H) or lower than the setting value SV-(AL-L).
ON
OFF
SV
SV-(AL-L) SV+(A
L
9
Deviation upper-limit with standby sequence:
This alarm output operates when PV value reaches set value (SV value) and the reached value is higher than the setting value
SV+(AL-H).
SV+(A
L
ON
OFF
SV
10
Deviation lower-limit with standby sequence:
This alarm output operates when PV value reaches the set value (SV value) and the reached value is lower than the setting
value SV-(AL-L).
SV-(AL-L)
ON
OFF
SV
11
Hysteresis upper limit alarm output: this alarm output operates if PV value is higher than the setting value SV+(AL-H). This alarm
output is OFF when PV value is lower than the setting value SV+(AL-L).
ON
OFF
AL-L
SV
AL-H
12
Hysteresis lower limit alarm output: this alarm output operates if PV value is lower than the setting value SV-(AL-H). This alarm
output is OFF when PV value is higher than the setting value SV-(AL-L).
ON
OFF
AL-H AL-L
SV
13
CT alarm output:
This alarm operates when the current measured by transformer (CT) is lower than AL-L or higher than AL-H (This alarm output is
available only for the controller with current transformer).
ON
OFF
AL-L
SV
AL-H
Note: AL-H and AL-L include AL1H, AL2H and AL1L, AL2L.
With standby sequence: It means that the alarm output would be temporarily disabled until the PV value reaches the set value. Then, the alarm output will operate.
Communication Protocol
Command code to read N words: 03H. The maximum value of N is 3. For example, in order to read two words from controller 01 (address 01H) at starting data address 4700H,
the command in ASCII mode is:
ASCII mode:
Response message:
STX ‘:’
STX ‘:’
‘0’ ‘0’ ADR1
ADR0
‘1’
ADR1
ADR0
‘1’
‘0’ CMD1
CMD0
‘3’
CMD1
CMD0
‘3’
‘4’ ‘0’
‘7’
Number of data
(count by byte)
‘4’
‘0’ ‘0’
Starting data address
‘0’ ‘1’
‘0’ ‘9’
‘0’
Content of start address 4700H
‘0’
‘0’ ‘0’
Number of data (count by word)
‘2’
Content of start address 4701H
‘0’