Rockwell-automation 1746-NO8V SLC 500 8-Point Analog Output Module/ Us Uživatelský manuál stáhnout pdf (Strana 66)

Publication 1746-UM026A-EN-P - September 2003

B-2 Replacing 1746-NO4s with 1746-NO8

Module Addressing

Addressing is changed from two modules with 4 channels to one

module with 8 channels. The output addressing is shown below.

Analog Conversion

The following information is provided for reference only; the

1746-NO8 is directly compatible with the 1746-NO4 when used in

Class 1 mode.

The 1746-NO8 converts a 16-bit two’s complement binary value into

an analog output signal using a 16-bit converter.

In 1746-NO4 compatible mode (e.g. Class 1), the 14 most significant

bits are used, as the 1746-NO4 uses a 14 bit converter.

The following tables identify the current and voltage output ranges for

the output channels, and their resolution when using 1746-NO4

compatible mode.

1746-NO4 Output Addressing

• O:3.0 - Slot 3, Channel 0 Data Word • O:4.0 - Slot 4, Channel 0 Data Word

• O:3.1 - Slot 3, Channel 1 Data Word • O:4.1 - Slot 4, Channel 1 Data Word

• O:3.2 - Slot 3, Channel 2 Data Word • O:4.2 - Slot 4, Channel 2 Data Word

• O:3.3 - Slot 3, Channel 3 Data Word • O:4.3 - Slot 4, Channel 3 Data Word

1746-NO8 Output Addressing

• O:3.0 - Slot 3, Channel 0 Data Word • O:3.4 - Slot 3, Channel 4 Data Word

• O:3.1 - Slot 3, Channel 1 Data Word • O:3.5 - Slot 3, Channel 5 Data Word

• O:3.2 - Slot 3, Channel 2 Data Word • O:3.6 - Slot 3, Channel 6 Data Word

• O:3.3 - Slot 3, Channel 3 Data Word • O:3.7 - Slot 3, Channel 7 Data Word

Table B.2 1746-NO8I and 1746-NO4I Output Range

Current Range Decimal Representation for

Output Word

Resolution per LSB

0 to 21 mA 0 to 32,764 2.56348 A

0 to 20 mA 0 to 31,208

4 to 20 mA 6,242 to 31,208

SLOT 0 1 2 3 4 5 6

SLOT0123 456

1 2 ... 61 62 63 64 65 66 67 68 69 70 71 72 73 74

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Rockwell-automation 1746-NO8V SLC 500 8-Point Analog Output Module/ Us Uživatelský manuál Strana 66