Instruction manual

Tank Gate Interface
48 Installation and Operations Manual
5.2.2 Application
The LJ1500 point provides an interface to the L&J MCG1200 Data Acquistion Interface. L&J Model 1200
are connected directly to a Model 8215 Tank Gauge Interface Module. The Model 8215 is automatically
detected at startup, and an LJSCAN point is automatically created to manage the scanning task.
The ID must match the unit address of the MCG 1200.
Dynamic Parameters Function
Command_0 through
Command_7
The state of the 8 LJ1200 relays. The coded variable output is set via
the Mode parameter.
WriteCmd Output Value for Relays
CmdStatus Status of Last Command
Value Value of the LJ1200 Contact Input
PntStatus Integer HEX value indicating status of point. Values are:
0x0002: Scan Timeout
0x0010: Gauge Not Responding
0x0020: Blown Transmit Fuse
0x0040: Parity Error
0x0080: Tankway Error
0x4000: Failure of the Model 8215. This bit is set if the Watchdog task
on the Motherboard determines that the Model 8215 has stopped
updating.
AlarmTime Time that alarm first occurred. The point is in alarm when the
PntStatus is non zero.
Elapse Time of the last scan.
ScanTime Time of the last good reading. A reading is considered good if it has no
parity or time-out error, and has passed the filter criteria.
Raw1 Raw data from gauge. Value reported as hexadecimal value.
PntCheckSum CRC-16 Checksum for point's static Configuration Parameters.