4 function block parameters, Function block parameters -8 – Yokogawa EJA115 User Manual
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IM 01C22T02-01E
5-8
5. CONFIGURATION
Table 5.13 View Object for AI1.AI2 Function Block
T0513.EPS
1
ST_REV
2
2
TAG_DESC
3
STRATEGY
4
ALERT_KEY
5
MODE_BLK
4
6
BLOCK_ERR
2
7
PV
8
OUT
5
9
SIMULATE
10
XD_SCALE
11
OUT_SCALE
12
GRANT_DENY
13
IO_OPTS
14
STATUS_OPTS
15
CHANNEL
16
L_TYPE
17
LOW_CUT
18
PV_FTIME
5
19
FIELD_VAL
20
UPDATE_EVT
21
BLOCK_ALM
8
22
ALARM_SUM
23
ACK_OPTION
24
ALARM_HYS
25
HI_HI_PRI
26
HI_HI_LIM
27
HI_PRI
28
HI_LIM
29
LO_PRI
30
LO_LIM
31
LO_LO_PRI
32
LO_LO_LIM
33
HI_HI_ALM
34
HI_ALM
35
LO_ALM
36
LO_LO_ALM
2
11
11
2
2
4
2
5
5
5
5
8
2
2
1
31
26
31
46
2
2
2
1
4
4
2
4
1
4
1
4
1
4
1
4
VIEW
1
VIEW
2
VIEW
3
VIEW
4
Relative
Index
Parameter Mnemonic
Totals (# bytes)
Table 5.14 Indexes of View for Each Block
T0514.EPS
VIEW_3
VIEW_2
VIEW_1
Resourse Block
Transducer Block
AI1 Function Block
AI2 Function Block
(PID Function Block)
VIEW_4
40100
40200
40400
40410
40800
40101
40201
40401
40411
40801
40102
40202
40402
40412
40802
40103
40203
40403
40413
40803
5.6.4 Function Block Parameters
Function block parameters can be read from the host or
can be set. For a list of the parameters of blocks held
by the EJA, refer to “List of parameters for each block
of the EJA” in Appendix 1. For PID/LM function
option, refer to Appendix 4&5. The following is a list
of important parameters with a guide to how to set
them.
MODE_BLK:
Indicates the three types of function block modes;
Out_Of_Service, Manual, and Auto. In
Out_Of_Service mode, the AI block does not
operate. The Manual mode does not allow values to
be updated. The Auto mode causes the measured
value to be updated. Under normal circumstances,
set the Auto mode to take effect. The Auto mode is
the factory default.
CHANNEL:
This is the parameter of the transducer block to be
input to the AI block. AI1 block is assigned differ-
ential pressure and AI2 block is assigned static
pressure, respectively. Do not change this setting.
XD_SCALE:
Scale of input from the transducer block. The
calibrated range is factory set (from 0% point to
100% point). Usually, the unit is set in kPa. Chang-
ing the unit (can be set only in pressure unit) also
causes the unit within the transducer block to be
automatically changed. (The unit is automatically
changed according to the unit selected by AI1.) Unit
index which can be set by XD_SCALE is as shown
below.
Table 5.15 Unit Index by XD_SCALE
T0515.EPS
MPa
kPa
hPa
bar
mbar
atm
1132, 1545 (abs), 1546 (gauge)
1133, 1547 (abs), 1548 (gauge)
1136, 1553 (abs), 1554 (gauge)
1137
1138
1140
L_TYPE:
Specifies the operation function of the AI block. If
set to “Direct”, the input delivered to CHANNEL is
directly reflected on OUT. If set to “Indirect”,
scaling by XD_SCALE and OUT_SCALE is carried
out and is reflected on OUT. If set to “Indirect
SQRT”, after scaling by XD_SCALE, the square
root is extracted and the value scaled by
OUT_SCALE is reflected on OUT.