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MASSA PRODUCTS CORPORATION June 11, 2013

Product Manual 14 M3 Wireless Ultrasonic Level Sensor

9.0 Configuration Registers

The M3 Configuration Registers control the operation of the sensor. This section describes in detail the function of each register.

Use the write and read commands to configure and validate each register location. If any register is outside the limits, then it will

be replaced with the factory default and the Error Indicator byte 65 bit 0 will be set. So confirm the Error byte after changing any

9.1 Configuration Register Table

Address

Data Collection Interval 1-3 0 - 16777215 default = 3600 (once an hour), resolution 1 second units

Deep-Sleep Timer 4-5 0 & 6 - 43200 default = 0 (timer disabled), 2.048 second units

Awake Timer 6-7 6-293 default = 12 (24 seconds), 2.048 second units

Outgoing Message Mode

(active when Deep-Sleep Timer non-zero)

8 0 – 6

Default = 0 (off), 1=AutoSend1, 2=AutoSend2, 3=AutoSend3,

4=Acknowledge, 5=AutoSend5, 6= AutoSend6

Zigbee / Unassociated state 9 0 & 4 - 254 default = 0, consecutive Awake periods to reboot if unassoc

User Description Field 32-63 32-126 default = 32 ASCII spaces

Error Indicator 65 see section 9.2.7 Note: bit 0 must be cleared to write to any register

Threshold Voltage #1 78 1 - 22 default = 8 (M3-150), 8 (M3-95) , 14 (M3-50)

Threshold Voltage #2 79 0 - 22 default = 6 (M3-150), 5 (M3-95) , 9 (M3-50)

Threshold Voltage #3 80 0 - 22 default = 4 (M3-150), 2 (M3-95) , 6 (M3-50)

Threshold Voltage #4 81 0 - 22 default = 2 (M3-150), 1 (M3-95) , 2 (M3-50)

Thresh. Switch Time #2 82-83 model dependent default = 2400 (M3-150), 8000 (M3-95) , 12000 (M3-50)

Thresh. Switch Time #3 84-85 model dependent default = 3200 (M3-150) , 12000 (M3-95) , 16000 (M3-50)

Thresh. Switch Time #4 86-87 model dependent default = 4000 (M3-150) , 16000 (M3-95) , 20000 (M3-50)

Outgoing Message Mode # Data

Records

101 1-8 default = 8. Available for FW versions 26 or greater.

Ultrasonic Waveform Cycles 109 1 - 20 default = 10

Ultrasonic Waveform Gain 110 0 or 1 Default = 1 (hi gain)

Ultrasonic Waveform Temperature 111 Temperature stored here at the time of ultrasonic waveform

Serial Number 115-118 Read Only

9.2 Sensor Configuration Register Description

9.2.1 Data Collection Interval Register (addr = 1-3)

The Data Collection Interval register controls the wake up period to acquire all pertinent sensor data and save it to the Sensor’s

Data History Buffer. The resolution for this 3-byte register is 1 bit per second with the LSB at location 1 and the MSB at location

3. A zero in this register will represent the Manual acquisition mode and will require Command #2 or Command #3 by the Host

device to perform a new acquisition of data. Minimum acquisition time is once every 10 seconds and a maximum of once every

194 days.

9.2.2 Deep-Sleep Timer Register (addr = 4-5)

The Deep-Sleep Timer register contains the time value which places the XBee radio in a low power sleep mode to increase battery

life of the sensor. The resolution for this 2-byte register is 2.048 seconds with the LSB at location 4 and the MSB at location 5.

After this timer expires, the XBee radio will turn on for the period indicated in the “Awake Timer” register (see below). The

Deep-Sleep Timer will wake up the sensor at its programmed rate and is independent of the Awake Timer. If the Awake Timer is

programmed to be longer than the Deep-Sleep Timer, a fault will be indicated in the Status1 byte message and bit 0 will be set in

the Error Indicator Register (section 9.2.7). On error, both of these timer registers will be replaced with the default values (see

Section 9.1). A zero in this register will disable the Deep-Sleep operation and the radio will wake up every 2 seconds (Awake

Timer register is ignored). However, if the sensor is not associated with a gateway, it will default to 1 minute sleep periods when

this register is zero. The sensor will not respond to any commands when it is sleeping.

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