Hoffer Flow Controls HIT-2A User Manual page 47

System
Description/Response/Comments
Command
Set Alarm Output On
SA
Unit Status
US
Clear Status
CS
Note:
The CL and ST commands work as follows. The ST command shall
store the present value of the total in Non-Volatile memory. This total
in non-volatile memory shall be the initial total in the event that device
power is removed and then re-applied. The CL command will clear the
total in the device and the stored total in EEPROM but retain the
present total in a volatile (RAM) memory location and keep it as the
old total value. Removal of power from the unit causes this old total
value to be lost. When the HIT-2A receives the ST<CR> from the PC,
it shall echo back the old total value until the unit adds any value to the
present total. If the HIT-2A receives a second CL command, the old
total value shall be set to 0.
HP-306
Appendix B
" Alarm Active "
Sets the alarm output active regardless of the settings.
"UNIT STAT = <DATA>"
Requests the status. The values for <DATA> with no or
only one error present are:
– No Errors present.
"0"
"128" – EPULSE error (0x080)
"129" – ETOTAL error (0x081)
"130" – ERATE error (0x082)
"132" – EFLOW error (0x084)
"129" – EERES error (0x088) (EEPROM reset to
factory defaults)
If multiple errors occur, the error codes are logically OR-ed.
For example, if the unit has an ETOTAL and ERATE error
occurring at the same time, the <DATA> = "131" (0x83).
" Status Cleared "
Clears all errors.
- Communications
39