10-32
10.35 READING OFFSET, INPUT OFFSET, or OUTPUT OFFSET continued
The meter (set to echo with “BUS.FMt”) responds: 15G09D17618<CR>. To translate
this, the 6 data nibbles are stripped out: “D17618”. The most significant bit (of the “D”
nibble) is a “1”, so the offset is negative. Decimal point is at position 4.
The magnitude, HEX “17618”, is decimal 95768, so the meter’s decimal reading offset
is -95.768.
True value for Output Offset is stored in its location in EEPROM. When
program is running, it combines this value with calibration offset of the Analog
Output Board and stores new value (called Modified Output Offset) in Output
Offset’s RAM location. Therefore, “P26” for this offset should be used very
carefully (avoid using if possible). But, with “G26”, value of modified output
offset can be read.
10.36 SETPOINT 1
AND 2 HYSTERESIS (“SP db”)
Command Suffix “14” uses two bytes (four nibbles, or four characters) for this binary
positive-only value. Both setpoints use this same hysteresis, applied 50% on either
side of the respective setpoint. This value is not kept in RAM (only in the EEPROM),
so that only “R” and “W” commands apply.
EXAMPLE: If the computer wants to know the hysteresis value stored by meter #15
hex, it sends:
“*15R14<CR>”, to which the meter replies:
“15R141A90<CR>” if it was programmed to echo with “BUS.FMt” and had decimal
hysteresis of 6,800 counts.
Maximum allowable value for hysteresis is 9999 counts.
10.37
ALARM (SP 3 AND SP 4) HYSTERESIS (“AL db”)
Identical with Section 10.36, suffix “15” commands use two bytes (four characters) for
this binary positive-only value. Both alarms use this same hysteresis, applied 100% on
the inactive side of the respective alarm point (setpoint), so that you get fast alarm
action and slower exit from that alarm. This value is not kept in RAM; “R” and “W”
interact with the EEPROM.
EXAMPLE: The computer sends “*15W1A90<CR>”, giving both alarms the hysteresis
value of hex 6800 Counts.
Maximum allowable value for hysteresis is 9999 counts.
10. Data Format Commands (P, G, R, W)
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