Table of Contents
Advertisement
(26)CH Loop disconnection detection dead band (address: 117H, 147H, 177H,
1A7H)
Standard
To prevent an error alert of loop disconnection detection, set a non-alert band (temperature band in which the
loop disconnection is not detected) where the set value (SV) is at the center.
Temperature process value (PV)
Set value
(SV)
For details on the loop disconnection detection function, refer to the following.
Page 212, Section 8.3.19
(a) Setting range
The setting range is 0 to full scale.
When the value of the remote buffer memory is set as follows; CH Input range (address: 100H, 130H,
Ex.
160H, 190H): 38 (Resolution: 0.1), CH Loop disconnection detection dead band (address: 117H, 147H,
177H, 1A7H): 50
The following calculation shows that within the range of the set value (SV) 5.0, Loop disconnection is
not detected.
• (Loop disconnection detection dead band set value) (resolution) = 50 0.1 = 5.0
(b) Setting unit
The value to be set differs depending on the stored value in CH Decimal point position (address: 620H,
621H, 622H, 623H). (Page 362, Appendix 3 (68))
• No decimal place (0): Set a value in 1 ( or digit) unit.
• One decimal place (1): Set a value in 0.1 () unit (tenfold value).
(c) Enabling the setting
Enable the setting contents by either of the following.
• Turning off and on Initial data setting request flag (RY9) while the operations of all channels are stopped
• Turning off and on During operation setting change instruction (RY10)
(d) Default value
The default values are set to 0 in all channels.
CH□ Loop disconnection detection dead band
(address: 117H, 147H, 177H, 1A7H)
(The area is equally set both above and below
Non-alert area
the set value (SV).)
Time
APPENDICES
A
335
Advertisement
Table of Contents
Troubleshooting
