Mitsubishi Electric NZ2GF2B-60TCRT4, User Manual

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303
APPENDICES
A
Appendix
2 Det
a
ils of
Rem
o
te
Regist
er
A
reas
(5) CH

Alert definition (RWr4 to RWr7)
Bits corresponding to alerts detected in each channel become 1.
*1 For the temperature measurement range, refer to the following.

Page 303, Appendix 2 (5) (a)
Bit data from b6 to b15 become Unused in the temperature input mode.
(a) Temperature measurement range
The temperature measurement range is as follows.
• (Input range lower limit - 5% of full scale) to (Input range upper limit + 5% of full scale)
Ex.
Calculation for the case when CH  Input range (address: 100H, 130H, 160H, 190H) is 38 and the
temperature measurement range is -200.0 to 400.0

• Input range lower limit - 5% of full scale = -200 - ((400.0 - (-200.0))

0.05) = -230.0
• Input range upper limit + 5% of full scale = 400 + ((400.0 - (-200.0))

0.05) = 430.0
Therefore, the temperature measurement range is -230.0 to 430.0

.
The temperature control module checks whether the input temperature is within temperature measurement
range of the input range. If the input temperature is out of the temperature measurement range, CH
 Input
range upper limit (b0 of RWr4 to RWr7) or CH  Input range lower limit (b1 of RWr4 to RWr7) turns to 1 (ON).
The conditions which the temperature control module uses to judge whether the measured temperature is
within the temperature measurement range or not differ depending on the following settings.
• CH  Stop mode setting (address: 118H, 148H, 178H, 1A8H) (

Page 336, Appendix 3 (27))
Target bit number Flag name Alert definition
b0 CH  Input range upper limit
Temperature process value (PV) has exceeded the temperature measurement range
*1
of the set
input range.
b1 CH  Input range lower limit
Temperature process value (PV) has fallen below the temperature measurement range
*1
of the set
input range.
b2 CH  Process alarm upper limit Temperature process value (PV) has reached the process alarm upper upper limit value or more.
b3 CH  Process alarm lower limit Temperature process value (PV) has reached the process alarm lower lower limit value or lower.
b4 CH  Rate alarm upper limit
The variation of temperature process value (PV) has reached the rate alarm upper limit value or
more.
b5 CH  Rate alarm lower limit
The variation of temperature process value (PV) has reached the rate alarm lower limit value or
lower.
b6 to b7

(fixed to 0)

(Unused)
b8 CH  Alert 1 Alert 1 has occurred. (  Page 169, Section 8.3.11)
b9 CH  Alert 2 Alert 2 has occurred. (  Page 169, Section 8.3.11)
b10 CH  Alert 3 Alert 3 has occurred. (

Page 169, Section 8.3.11)
b11 CH  Alert 4 Alert 4 has occurred. (

Page 169, Section 8.3.11)
b12  (fixed to 0)  (Unused)
b13
CH  Loop disconnection
detection
Loop disconnection has been detected. (

Page 212, Section 8.3.19)
b14

(fixed to 0)

(Unused)
b15

(fixed to 0)

(Unused)
Common
b15 b2 b1 b0 b5 b4 b3 b7 b6 b8 b9 b10 b11 b12 b13 b14
0 0 0
Bit data b15 is
fixed to 0. Bit data from b6 to
b7 are fixed to 0.