Yokogawa EJA115 - Manual (Page 41)

IM 01C22T03-00E A-3
APPENDIX 1. LIST OF PARAMETERS FOR EACH BLOCK OF THE EJA
A1.2 AI Function Block Parameter List (AI1: Slot=1 AI2: Slot=2)
Index
16
Parameter
Block Object
Write
Mode
--
Initial Value Description
Information on this block such as Block Tag, DD Revision,
Execution Time etc.
24 Batch AUTO 0
This parameter is intended to be used in Batch applications in
line with IEC 61512.
35 Limit Hysteresis AUTO 0.500
Amount the PV must return within the alarm limits before the alarm
condition clears. Alarm Hysterics is expressed in engineering unit.
27 PV Scale O/S 100,0
Conversion of the Process Variable into percent using the high
and low scale values.
19 Strategy AUTO 0
The strategy field can be used to identify grouping of blocks.
This data is not checked or processed by the block.
20 Alert key AUTO 0
The identification number of the plant unit. This information
may be used in the host for sorting alarms, etc.
21 Target Mode AUTO AUTO
Set the Target of block mode (MODE_BLK) to Auto, Man or O/S
according to the Write Mode of the parameter to be set or changed.
18 TAG AUTO Space The user description of the intended application of the block.
28 Out Scale O/S
AI1:Specified at
the time of order
AI2:100,0,kPa,1 Scale of the Process Variable
This parameter contains the values of the lower limit and upper limit
effective range, the code number of the engineering unit of Process
Variable and the number of digits to the right of the decimal point.
33 Fail Safe Mode AUTO
Storing last valid
Output value Defines reaction of device, if a fault is detected.
Refer to table 7.2 Fail Safe Mode
26 Output MAN Valiable
This parameter contains the current measurement value from
Transducer Block or configuration adjusted engineering unit
and the belonging state in AUTO MODE.
OUT contains the value and status set by an operator in MAN
MODE.
30 Channel O/S
AI1:Primary
Value
AI2:Static
Pressure Value
Reference to the active Transducer Block which provides the
measurement value to the Function Block.
23 Alarm Sum -- For future use.
32 Filter Time Const AUTO 2.000 Time constant of a single exponential filter for the PV, in seconds.
37 Upper Limit Alarm AUTO IEEE: +INFINITE The setting for high high alarm in engineering units.
39 Upper Limit Warning AUTO IEEE: +INFINITE The setting for high alarm in engineering units.
41 Lower Limit Warning AUTO IEEE: –INFINITE The setting of the low alarm in engineering units.
43
46
47
Lower Limit Alarm AUTO IEEE: –INFINITE The setting of the low low alarm in engineering units.
Upper Limit Alarm -- For future use.
Upper Limit Warning -- For future use.
29 Characterization Type O/S Linear Not used for EJA
34 Fail Safe Default Value AUTO 0
Default value for the OUT parameter, if sensor or sensor
electronic fault is detected. The unit of this parameter is the
same as that for the OUT one.
22 Mode Block --
The mode parameter is a structured parameter composed of
the actual mode, the normal mode, and the permitted mode.
Actual: Indicates the current operating condition.
Permited: Indicates the operating condition that the block is
allowed to take.
Normal: Indicates the operating condition that the block will
usually take.
17 Static Revision No -- 0
The revision level of the static data associated with the function
block. The revision value will be incremented each time a static
parameter value in the block is changed.
TA0102-01.EPS