Chapter 4. Programming Guide
14 | 8000/8100/8200 Series Instruction Manual-English
© 2010 Baker Hughes, a GE company – All rights reserved.
4.2 Communication Modes
The TERPS smart transducer operates in one of two operating modes: direct and addressed.
These modes are controlled by sending the transducer an address number, see Section 4.3.2
on page 15.
4.2.1 Direct Mode
The valid address in direct mode is zero. In this mode, the transducer continuously transmits
data at an interval set by the user. Before any command can be sent to the transducer, the
data stream must be stopped by sending a single byte character or back space. The stop
character is lost and not parsed with the instruction.
Note:
On shipment, sensors are set to direct mode as default.
4.2.2 Addressed Mode
The valid address in addressed mode is a number between 1 and 32. In this mode, data has to
be polled from the transducer using the valid address. All devices on the network respond to
the address 0 for the G, R, I and Z commands. The reply timing depends on the address of the
sensor. Each sensor delays its response until all sensors with a lower address have replied.
Note:
The 0:I command returns only the sensor serial number.
Table 4-2: Query Summary
Group
Function
Query
General Set-up
Automatic transmission interval?
A,?
Device address?
N,?
Pressure measurement speed?
Q,?
Pressure units?
U,?
PIN Set-up
a
a. PIN functions are disabled for USB versions.
Digital output calibration
C,?
Full-scale value?
H,?
User message?
M,?
Communication settings?
O,?
PIN set?
P,?
Offset value?
S,?
Factory Set-up
(Query only)
Crystal Reference Frequency
E,?
Load Calibration Coefficients
L,?
Analogue/Digital Converter Set-up
T,?
Transducer Type and Settings
V,?
Write to EEPROM
W,?
