GF U3000 V2, Руководство по эксплуатации

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GF U3000 V2 Ultrasonic Flowmeter Modbus Supplement to the operating instructions
3.9 Status Flags
Various status flags that have not been discussed earlier, are outlined in the register map in Figure above, but are also shown below
along with a more verbose description of their use.
Element Bit name Description
Instrument Control Flags Lock screen mode
This is a Read/Write bit. When read, it indicates whether the Lock Screen
Mode on the unit is on (=1) or off (=0). To change the Lock Screen Mode, follow
the procedure outline in 2.6.2 but substitute step 3 and 4, first with a MASK
WRITE REGISTER message (command 22 or 0x16) to register address 6
(address 5) and the OR set as appropriate to set to Lock screen Mode. This is
followed by another MASK WRITE REGISTER message (command 22 or 0x16)
to register address 6 (address 5) with the AND mask being set to 0xFFFB and
the OR mask being 0x0004. This will initiate an “Update Lock Screen Mode”
command on the unit.
Instrument General
Flags Screen lock mode active This flag indicates that the unit is reading flow, lock screen mode is enabled,
and the keyboard is locked against local entry for the moment.
Status Flags Online The unit is currently reading flow. This flag is reset when the unit stops
reading flow and enters the configuration mode.
Status Flags Urgent Error
An urgent error has been reported. This can be useful to indicate that a
serious error has occurred in the unit. For a list of urgent errors see the GF
U3000 V2 Ultrasonic Flowmeter manual.
Status Flags Remote Total Changes
Disabled A local operator has temporarily barred the MBM from changing the flow
totals.
Status Flags Current Loop Alarm An alarm condition has been set on the current-loop and the conditions that
trigger it has been met.
Status Flags
Digital Device 0 .. 3
N.B. Digital device 0 is currently unimplemented, and so will always read
zero. Digital device 1..3 correspond to output 1..3. If a flag is set then this
output has been configured as an alarm, and the alarm condition has been
met.
Status Flags Hot / Cold probe fault The hot or cold probe is faulty or has been disconnected. The temperature
associated with a faulty or disconnected probe will -259.3 °C
Status Flags Signal Loss The ultrasonic signal has been lost. Flow and volume readings will be frozen.
4 GLOSSARY
Below is a list of abbreviations and their meaning:
Abbreviation Meaning
MBM Modbus Master
SP Single Precision
DP Double Precision
REG Register
IDX Index