Yokogawa FVX110 - Manual (Page 145)

A6-3
IM 01S01C01-01EN
A6.3 Fault State
Blocks and inputs in the MAO function block that are not in the normal state transition to the fault state status.
Use the FSTATE_STATUS parameter to confirm inputs in the fault state status.
A6.3.1 Transition to Fault State
If the input status stays in the Bad status for longer than the time set using FSTATE_TIME, the input transitions
to the fault state status. When the MAO function block is in LO mode, all inputs transferred to LCD Transducer
Block transition to the fault state status.
A6.3.2 Clearing a Fault State
Run the MAO function block in Auto mode to change the status of inputs to something other than Bad to clear
fault state status.
A6.3.3 Fault State Operation
Operation in fault state status is defined by MO_OPTS.
MO_OPTS
Definition
bit Name
0 Fault state to value 1 Operation when input 1 is in the fault state
1 Fault state to value 2 Operation when input 2 is in the fault state
2 Fault state to value 3 Operation when input 3 is in the fault state
3 Fault state to value 4 Operation when input 4 is in the fault state
4 Fault state to value 5 Operation when input 5 is in the fault state
5 Fault state to value 6 Operation when input 6 is in the fault state
6 Fault state to value 7 Operation when input 7 is in the fault state
7 Fault state to value 8 Operation when input 8 is in the fault state
8 Use fault state value on restart 1 Operation when input 1 is in the fault state at restart
9 Use fault state value on restart 2 Operation when input 2 is in the fault state at restart
10 Use fault state value on restart 3 Operation when input 3 is in the fault state at restart
11 Use fault state value on restart 4 Operation when input 4 is in the fault state at restart
12 Use fault state value on restart 5 Operation when input 5 is in the fault state at restart
13 Use fault state value on restart 6 Operation when input 6 is in the fault state at restart
14 Use fault state value on restart 7 Operation when input 7 is in the fault state at restart
15 Use fault state value on restart 8 Operation when input 8 is in the fault state at restart
Use Fault state to value 1 – Fault state to value 8 to set fault state operation either to transfer the value prior to
fault state status to LCD Transducer Block (0: freeze) or to transfer FSTATE_VAL 1 – FSTATE_VAL 8 to LCD
Transducer Block (1: present).
When the Use fault state value on restart 1 – Use fault state value on restart 8 bit is on, values set by FSTATE_
VAL 1 – FSTATE_VAL 8 are used as default values at restart. (When this bit is not on, the value stored in IN_1
– IN_8 prior to restart is used as the default value after restart.)
The status of inputs in fault state status transitions from “Bad – No comm with LUV – Const” or “Bad – No
comm, no LUV – Const.” (Refer to Appendix 6.4)