Pni RM3000 Sensor Suites Bedienungsanleitung PDF herunterladen (Seite 30)

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RM3000 & RM2000 Sensor Suite User Manual – July 2012 Page 30 of 41

consumption. See Figure 3-4, Figure 3-5, and Figure 3-6 to estimate the appropriate cycle

count value for your application. Once the Cycle Count Registers are set, they do not need to

be repopulated unless the user wants to change the values or the system is powered down (in

which case the default values would populate the register fields when powered up again).

To initiate a read to or write from the Cycle Count Register, the command byte is defined as:

Bit #

Value

R/W

ADR3

ADR2

ADR1

ADR0

R/W: Read/Write

HIGH signifies a Read operation from the addressed register. LOW signifies a Write

operation to the addressed register.

ADR0 – ADR3: Register Address Bits

Establishes which register will be written to or read from. Each sensor is represented

by two registers, with addresses defined as follows:

Table 5-1: Cycle Count Register Commands

Read Command

Byte

Write Command

Byte

X Axis Cycle Count Value - MSB

X Axis Cycle Count Value - LSB

Y Axis Cycle Count Value - MSB

Y Axis Cycle Count Value - LSB

Z Axis Cycle Count Value - MSB

Z Axis Cycle Count Value - LSB

Since the registers are adjacent, it is not necessary to send multiple Command Bytes, as the

3D MagIC automatically will read/write to the next adjacent register.

A sample command sequence is provided below which sets the cycle count value to 100

(64

) for all 3 axes. This is purely for illustrative purposes and the value could be different

and/or the number of axes to be addressed could be different.

Start with SSN set HIGH, then set SSN to LOW.

Send 83

(this is the Write Command Byte to address the MSB for the X axis)

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