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Mitsubishi Electronics Q68RD3-G ユーザーズマニュアル

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3
SPECIFICATIONS
3.4 Buffer Memory
3.4.14 Disconnection detection flag (Un\G49)
3
 - 39
1
O
V
ER
VI
E
W
2
SY
STEM
 
CONFIGURA
TION
3
SP
ECIFICA
T
IONS
4
P
R
OC
EDU
R
ES
 A
ND 
SE
TTINGS B
E
FORE
 
SY
STEM
 O
PER
A
T
ION
5
UTIL
ITY P
A
CK
AGE
 
(GX CONFIGURA
T
O
R-TI)
6
P
R
OGRAM
M
ING
7
ONLINE MO
D
U
LE
 
CH
A
N
G
E
8
TR
O
U
B
L
E
S
HOOTING
3.4.14
Disconnection detection flag (Un\G49)
(1) The flag of the corresponding channel turns ON (changes to "1") when 
the disconnection state of RTD is detected.
(2) Disconnection detection is executed on conversion-enabled channels 
only.
(3) Disconnection state is detectable for each channel.
(4) If disconnection is detected on any of conversion-enabled channels, 
Disconnection detection signal (XC) also turns ON.
For a channel where disconnection is detected, a value based on the 
Conversion setting for disconnection detection (Un\G164 and Un\G165) 
is stored in the CH  Measured temperature value (Un\G11 to Un\G18).
Conversion for the channels not disconnected is continued.
(5) When Operating condition setting request (Y9) or Error clear request 
(YF) is turned ON, this flag will be cleared.
(6) The following table shows the relationship between the Disconnection 
detection flag and conversion enable/disable setting.
Table 3.13 Relationship between the Disconnection detection flag and conversion enable/disable setting
Connection status
Conversion enable/disable 
setting
Disconnection detection 
flag
Enable
OFF
Disable
Enable
ON
Disable
OFF
Enable
ON
Disable
OFF
b15
b14
b13
b12
b11
b10
b9
b8
b7
b6
b5
b4
b3
b2
b1
b0
CH8 CH7 CH6 CH5 CH4 CH3 CH2 CH1
0
0
0
0
0
0
0
0
0: Normal
1: Disconnected
Data for b8 to b15 is fixed to "0".
A
B
b
Without disconnection
A
B
b
With disconnection
A
B
b
Without connection