Spirax Sarco MTI10 Insertion, Инструкция по установке и обслуживанию, Страница: 86 / 126

86
MODBUS
Command Request:
<Meter Address> <Function code=04> <Register address =0> <Register
address =0>
<Register count =0> <Register count =1> <CRC high> <CRC low>
Command Response:
<Meter Address> <Function code=04> <Byte count-=2> <Status
High><Status Low>
<CRC high> <CRC low>
The MTI10/MTL10 supports only reading of the MTI10/MTL10 status. The
register address must be set to zero (Modbus Address 30001) and the
register count must be set to 1.
Table 6.2: Status bits definitions (Modbus Address 30001)
Bit Definition Comment
0 Power up indication Reset when out of the power up sequence
1 Flow rate reached high limit threshold Set limit to zero to disable
2 Flow rate reached low limit threshold Set limit to zero to disable
3 Temperature reached high limit threshold Set limit to zero to disable
4 Temperature reached low limit threshold Set limit to zero to disable
5 Sensor reading is out of range Check sensor wiring
6 Velocity flow rate outside of calibration table Check sensor wiring
7 Incorrect Settings Check settings
8 In simulation mode Set simulation value to 0 to disable
9 Frequency output is out of range Check frequency output settings
10 Analog 4-20 mA for flow is out of range Check analog output settings
11 Analog 4-20 mA for temperature is out of range Check analog output settings
12 Busy Check wiring from RS485 to Anybus IC
13 Bridge Shutdown Check RTC
14 CRC error Check parameters and reset CRC
15 Tot Error Reset total
Table 6.3: Status 2 bits definitions (Modbus Address 30002)
Bit Definition Comment
0 CAL-V in progress CAL-V in progress
1 ADC12<>ADC24 too far apart Internal ADC calibration out of range
2 CAL-V Diff out of range CAL-V Diff out of range
3 Curve #2 Selected (for 2 gas curve only) Curve #2 Selected (2 gas curve only)
4 Zero Check Failed Zero Check Failed
5 CAL-V/Zero Check Aborted CAL-V/Zero Check Aborted
Protocol