Cooper Instruments & Systems DFI INFINITY Digital Force Indicator/Controller - Manual (Page 31)

Table 8.8 Description of Special Characters Used for Communication Commands
CHARACTERS PROCESS, STRAIN GAUGE,
TEMP., UNIVERSAL METER RATE/SQ METER BATCH METER
a Alarm status character Same Same
b Peak/valley status character N/A N/A
first Value of current reading Rate value Batch value
second Value of filtered reading Average Rate Value No. of Batches
third Value of peak reading Total value Total value
fourth Value of valley reading Time value Time value
Space Same Same
S Space or Same Same
1 Three characters for the unit
of measurement First unit of
measurement First unit of
measurement
2 N/A Second unit of
measurement Second unit of
measurement
hh Checksum Same Same
Carriage return Same Same
LF Line feed Same Same
[ ] Optional item Same Same
The length of the message transmitted by the meter in response to the “V01” command is variable and
controlled by the two menu items as “DAT FT” (Data Format” and “BUS FT” (Bus format). (See Sections 10.18
and 10.19 for strain, temperature, process and universal; and Sections 11.24 and 11.25 for ratemeter/totalizer,
batch), (For pushbutton programming, see Appendix A).
8.8 “^AE” Response Format
The meter’s response to “^AE[nn]” is 4 bytes of data, sent as 8 HEX-ASCII characters, followed by a
carriage return no other characters even when programmed to echo). These four bytes are:
1:Serial Recognition Character below; e.g., “*”, sent HEX-ASCII “2A”)
2:Device Address (this is sent even when the meter is set for point-to-point; below; e.g., “199”, sent as HEX-
ASCII “C7”)
3: Bus Format Byte (“BUS FT”; e.g., HEX-ASCII “5C” for multipoint mode with echo)
4: Serial Communications Configuration Byte (“SER.CNF”: e.g., HEX-ASCII “56” for 2 stop bits, even parity, and
19200 baud)
8.9 Examples: Temperature/Process/Strain/Universal Meters
The following are examples of the different commands and their proper responses from
temperature/process/strain/universal meters.
For the following examples assume that:
a) echo mode
b) “*” as the recognition character of the meter
c) meter’s address is “15 HEX” if it is used in the multipoint mode
d) no line feed or checksum characters are included
1. Read serial recognition character from EEPROM in point-to-point mode:
Command format *R1E
Response format R1E2A
(Since “2A” is HEX-ASCII value of “*” in the table).
2. Read serial address from the RAM of the meter number “15 HEX” in the multipoint mode:
CF 125 INFINITY SC GUIDE
27 M1519/N/0605