HA243821
Issue 5 Mar 98
Section5
Page 5 - 41
MODEL 346 INSTALLATION AND OPERATION MANUAL
5.7.5 PARAMETER ACCESS (Cont.)
Table 5.7.5g Derived variable calculation parameter definitions
Mne-
monic
For-
mat
Mne-
monic
CN *
CN *
Bits
Bits
Derived variable parameter description
Access
wrt. host
1I
t o 5 I
DV
FD
K1
t o K 5
VA
VD
VM
VS
VU
5
6
5
8
3
5
0
B
9
k to s
1 to 9
k to s
k to s
k to s
k to s
k to s
k to s
k to s
Derived variable input. Specifies source of input to derived variable
calculations
00 = Channel 1
08 = DV3
01 = Channel 2
09 = DV4
02 = Channel 3
10 = DV5
03 = Channel 4
11 = DV6
04 = Channel 5
12 = DV7
05 = Channel 6
13 = DV8
06 = DV1
14 = DV9
07 = DV2
15 = Constant
Derived variable calculation value.
Derived variable calculation function.
00 = Off
10 = Average
01 = Add
11 = Polynomial
02 = Subtract
12 = Log base 10
03 = Divide
13 = Power of 10
04 = Multiply
14 = Mass flow (square root)
05 = Linear slope
15 = Mass flow (linear)
06 = High select
16 = Sterilization constant
07 = Low select
17 = Relative humidity
08 = High peak
18 = Zirconia probe
09 = Low peak
DV Calculation constant. Defines the mantissa and exponent for each
constant. See format 8 definition in table 5.8.6a for details.
DV calculations reset action equation. Specifies triggers to reset a DV
calculation. See format 3 definition in table 5.8.6a for details.
Changing this parameter resets the DV calculation.
Derived variable calculation decimal point position.
00 = DDDDD.
03 = DD.DDD
01 = DDDD.D
04 = D.DDDD
02 = DDD.DD
Derived variable calculation communications reset. Any value written
with this parameter will cause a reset of the selected DV calculation.
When read, this parameter always returns >0001.
Derived Variable calculation descriptor. 16-character descriptor.
Derived variable calculations engineering units. Five character string.
R/W
Read only
R/W
R/W
R/W
R/W
R/W
R/W
R/W
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
