Specifications

Command Set 4-17
To clear a setpoint, use the Clear Zero (CZ) command.
The SP command writes over data written into the Output Offset Register by
the Trim Zero (TZ) command. If the Output Offset Register is used as a trim
value, this must be accounted for by the host before using the SP command.
The value stored in this register may be read back using the Read Zero (RZ)
command.
The setpoint data or trim data in the Output Offset Register is saved in
nonvolatile memory.
Setup Command (SU)
Each D1000 module contains an EEPROM (Electrically Erasable Program-
mable Read Only Memory) which is used to store module setup information
such as address, baud rate, parity, etc. The EEPROM is a special type of
memory that will retain information even if power is removed from the
module. The EEPROM is used to replace the usual array of DIP switches
normally used to configure electronic equipment.
The SetUp command is used to modify the user-specified parameters
contained in the EEPROM to tailor the module to your application. Since the
SetUp command is so important to the proper operation of a module, a whole
section of this manual has been devoted to its description. See Chapter 5.
The SU command requires an argument of eight hexadecimal digits to
describe four bytes of setup information:
Command: $1SU31070182
Response: *
Command: #1SU31070182
Response: *1SU3107018299
Trim Span (TS)
The trim span command is the basic means of trimming the accuracy of a
D1000 module. The TS command loads a calibration factor into nonvolatile
memory to trim the full-scale output of the signal conditioning circuitry. It is
intended only to compensate for long-term drifts due to aging of the analog
circuits, and has a useful trim value of ±10% of the nominal calibration set
at the factory. It is not to be used to change the basic transfer function of the
module. Full information on the use of the TS command may be found in
Chapter 9.
Command: $1TS+00500.00
Response: *
Command: #1TS+00500.00
Response: *1TS+00500.00B0