Varec 2920, Инструкция по установке и эксплуатации, Страница: 188 / 194

2920 Float & Tape Transmitter Appendix C — Bi-Phase Mark Implementation
178 Installation and Operations Manual
LA Low Alarm
The low alarm level is triggered with the level falls below the LA, the
relevant level status bit is set. This bit remains set until the level is again
above the low level alarm setting.
LL Low Low Alarm
Low Low sets the low-low alarm level. Monitoring of Low Low is identical
to the Low Alarm.
TD Temperature Dimension (C or F)
The units in which the measured temperature is transmitted.
LD Level Dimension (M, F, I, P)
The units in which the level is transmitted. Valid values are Meters, Feet,
Inches, P-fractions (feet, inches, 1/16ths).
AR Accept Reference
After issuing the AR command, the processor accepts the reference level
(RL) as the current level. AR is used during level calibration.
LQ Innage Servo Level Request—responds with Tank Level
Computes innage level with status characters.
RL Reference Level
Temporary storage for level until an AR command is issued.
RN Relay Command
A–Activate, D–Deactivate, K–Acknowledge (used with DO 1 & 2)
If the relays have been set for remote control, the relays can be activated
or deactivated using the item RN.
RX Relay Status
A–Active, T– Active with a Duration, D–Deactive, FF–Failure
The current setting or status of the relays can be read using the RX item.
RY Relay Alarm Mode
RC–Remote Control (Host Control), HH–High High, HA–High Alarm, LA–
Low Alarm, LL–Low Low Alarm, NM–Not Mounted
Using the RY item, the relay can be used:
• An alarm relay coupled to one of the programmable software alarms
• Remote controlled relay using the receiving system
TOR Item
Description