BusWorks®
961/962PB Module User’s Manual ProfiBus Differential I/V Input
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Acromag, Inc. Tel:248-624-1541 Fax:248-624-9234 Email:
http://www.acromag.com
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Data Types
Description
Percentage
(This Model)
A 16-bit signed integer value with resolution of
0.005%/lsb.
20000 is used to represent
100%. For
example, -100%, 0% and +100% are represented by
decimal values
–20000, 0, and 20000, respectively. The
full possible range is
–163.84% (-32768 decimal) to
+163.835% (+32767 decimal).
Temperature
A 16-bit signed integer value with resolution of 0.1
C/lsb.
For example, a value of 12059 is equivalent to 1205.9
C,
a value of
–187 equals –18.7
C. The maximum possible
temperature range is
–3276.8
C to +3276.7
C.
Discrete
A discrete value is generally indicated by a single bit of an
8-bit byte. The bit number/position typically corresponds
to the discrete channel number. Unless otherwise
defined for outputs, a 1 bit means the corresponding
output is closed or ON, a 0 bit means the output is open
or OFF. For active-high inputs, a value of 1 means the
input is in its high state (usually >> 0V), while a value of 0
specifies the input is in its low state (near 0V). For active
low inputs, a value of 1 means the input is ON (active low
near 0V), while a value of 0 specifies the input is OFF or
in its high state (usually >> 0V).
This model includes three user parameterization bytes
(User_Prm_Data) defined as follows:
Byte
Description
Default
0
Do Not Use
– Reserved for SPC3 ASIC.
NA
1
Channel 0, 1, 2 Range Select:
00H = 0-20mA (961PB); ±10VDC (962PB)
01H = 4-20mA (961PB); ±5VDC (962PB)
02H = 0-11.17mA (961PB); ±2.5VDC (962PB)
03H = 0-1mA (961PB); ±1.25VDC (962PB)
04H = Not Defined (961PB); ±625mVDC (962PB)
05H = Not Defined (961PB); ±313mVDC (962PB)
06H = Not Defined (961PB); ±156mVDC (962PB)
07H = Not Defined (961PB); ±78mVDC (962PB)
08H
– FFH = Not Defined
00H
2
Channel 3, 4, 5 Range Select:
00H = 0-20mA (961PB); ±10VDC (962PB)
01H = 4-20mA (961PB); ±5VDC (962PB)
02H = 0-11.17mA (961PB); ±2.5VDC (962PB)
03H = 0-1mA (961PB); ±1.25VDC (962PB)
04H = Not Defined (961PB); ±625mVDC (962PB)
05H = Not Defined (961PB); ±313mVDC (962PB)
06H = Not Defined (961PB); ±156mVDC (962PB)
07H = Not Defined (961PB); ±78mVDC (962PB)
08H
– FFH = Not Defined
00H
3
Writing 55H to this register will cause the module to
restore its original factory calibration. Note that 55H is
not stored, but acts as a trigger, as this byte always
reads as 00H.
00H
4
Factory Use Only
– Do Not Modify.
00H
Data Types
Module Specific Parameters
(User_Prm_Data)
Note that channels 0, 1, & 2,
and channels 3, 4, & 5 (every
group of 3 channels) share the
same input configuration, but
the configuration may vary
between the two groups. All
parameterization bytes take
effect immediately. This
model does not include any
user defined diagnostic data
(Ext_Diag_Data).
