Levelcom 100 - Page 92

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Write functions:

Writing values to the following registers allows the specific gravity and alarm set points to be

modified remotely. Note that writing to these registers will update the configuration of the

LevelCom 100.

The normal value of these registers is 0. A non-zero value in one of these registers causes

the LevelCom to update the internal configuration, and after this is done, the LevelCom

writes a 0 value back to the register. This return to 0 can be used as a signal that the

operation is complete.

40012 Specific Gravity Specific Gravity x 1000

40013 HiHi Alarm HiHi alarm set point in 0.1 inches

40014 Hi Alarm Hi alarm set point in 0.1 inches

40015 Lo Alarm Lo alarm set point in 0.1 inches

40016 LoLo Alarm LoLo alarm set point in 0.1 inches

Setting the following coil bits triggers the actions as noted. When the action is initiated by the

LevelCom 100 the coil is cleared and reset to "0".

00001 Purge Now Triggers the purge cycle

00002 Sample Now Forces a new level sample

00003 Acknowledge Allows remote acknowledge for alarm and fault conditions

00004 Restart Restarts the LevelCom

Notes:

Base units and Big Number

Level and volume are stored in the LevelCom 100 in specific base units. These values are

scaled for display on the LevelCom 100 based on the desired output units. The Modbus data

is given only in the base units and must be converted by the user application.

Level is reported by the LevelCom 100 in 0.1 inches. The conversion factors for the other

units available in the LevelCom 100 are as follows:

Feet = 0.1 inches / 120

Centimeters = 0.1 inches x .254

Meters = 0.1 inches x .00254

Volume is reported by the LevelCom 100 in two possible base units. You must check the Big

Number flag in output register 10005. If this coil is set then the base output units are full

liters, if the flag is not set the output units are in 0.1 liters. This flag will only be set if an

extraordinarily large volume or weight value is input into the Tank Table during the

programming of the LevelCom 100. The default condition is Big Number = 0, volume

reported in 0.1 liters.