Watlow Series D8 - Manual (Page 77)

Series D8 User’s Guide Chapter 3: Communicating by DeviceNet
Doc. 0600-3120-2000 Watlow Anafaze 59
phrase and in some cases a number, see the parameter infor-
mation in Chapter 6, Menu and Parameter Reference. The in-
teger value appears in parentheses following each option. Use
that integer value when you set or interpret the value of the pa-
rameter via DeviceNet.
Bit-Wise Values
Some settings, such as those that enable alarms, are stored as
bits within words. To examine the value of just one bit, you
can “and” the value with a mask word to extract the particular
bit in which you are interested. To set or clear the bit, add or
subtract the appropriate value to change the value of the word.
For example, to extract the fourth bit from a value in a bit-wise
parameter, you would “and” it with a word that is all zeros ex-
cept the fourth bit (0000000000001000, or 8 in decimal). To
set the bit, add 8 to the value. To clear the bit, subtract 8 from
the value.
NOTE! Throughout this manual, we refer to the least
significant bit as the rightmost bit.
Decimal Placement for Numeric Values
Numeric values that are in the loop’s engineering units are
stored as integers. The number of decimal places that are as-
sumed when a parameter value is stored in the controller de-
pends upon the Input type and Disp format parameter values
for the loop. See Table 3.4.
Table 3.4 Number of Decimal Places for
Numeric Values via Logic
Input Type Display Format
Decimal
Places
Any thermocouple -999 to 3000 1
RTD -999.9 to 3000.0 1
Process
-999 to 3000 1
-9999 to 30000 0
-999.9 to 3000.0 1
-99.99 to 300.00 2
-9.999 to 30.000 3
-0.9999 to 3.0000 4