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BusWorks® 965EN Module User’s Manual Modbus TCP/IP mV/TC Input
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Acromag, Inc. Tel:248-295-0880 Fax:248-624-9234 Email:
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Addr.
Description
Data Type/Format
Holding Registers (4x References, Read/Write)
4
0180
00B3
Span Cal
Register
A 16-Bit value whose bit position when
set indicates the channel to be
calibrated for span. For example: to
calibrate span of channel 0, write 0001H
to this register. To calibrate span of
channel 5, write 0020H to this register.
4
0181
00B4
Zero Cal
Register
A 16-Bit value whose bit position when
set indicates the channel to be
calibrated for zero. For example: to
calibrate zero of channel 0, write 0001H
to this register. To calibrate zero of
channel 5, write 0020H to this register.
4
0182
00B5
Reserved
Reserved
4
0183
00B6
Tref Cal
Register
A 16-Bit value whose bit position when
set indicates the CJC channel to be
calibrated. For example: to calibrate
CJC0, write 0001H to this register. To
calibrate CJC1, write 0002H to this
register. To calibrate CJC2, write
0004H to this register.
IMPORTANT: You must FIRST write
5E2AH into the Calibration Access
Register (Register 40021) before
attempting calibration.
43001
.
.
.
This block
Mirrors 3xxxx
Registers.
Refer to Register Mirroring. 3xxxx Input
Registers are mapped to the 43xxx
Holding Register space using an
address offset of 43000.
Notes (Memory Map):
With 16-bit signed integers, a count of 0-7FFFH is a positive number,
while 8000-FFFFH is a negative number. The ±1V DC input range
values are represented by
20000 counts. For example when using
bipolar devices, -1V, 0V, & +1V are represented by integer values
–
20000, 0, & +20000, respectively. Similarly, when connected to a
unipolar device, integer values from 0-20000 counts represent 0-1V,
excluding negative values. A 16-bit signed integer value is also used to
represent the range of a TC type measured in degrees C with resolution
of 0.1
C/lsb. For example, a JTC type has a range of -210 to 760C,
which read -2100 to 7600 counts within the data register respectively. .
(See Table 1: Supported TC Types, Ranges, and Accuracy for Upscale
or Downscale break detection)
Register Map
Model 965EN-4006
Model 965EN-4004
IMPORTANT: You must
FIRST write 5E2AH into the
Calibration Access Register
(Register 40021) before
attempting span, zero, or Tref
calibration via these registers.