Micromod MOD: MODBUS RTU Communications Guide Manual do Utilizador descarregar pdf (Página 12)

MODBUS RTU

COMUNICATIONS GUIDE

USING ML AND CL BLOCKS:

DIRECTING DATA WITH ML AND CL BLOCKS

CL blocks can be connected to MSC blocks, and are usually used for discrete points. A CL block is required

for multi-register “standard” MODBUS functions, such as those needed for floating point signals. If a floating

point value is placed into an ML block, it is converted to a 16-bit integer value to be sent to the host. If floating

point values are placed into a CL, they can be connected to a multi-register input of the MSC block using two

registers, or 32 bits. The data format is per ANSI / IEEE Std 754-1985 for Binary Floating-Point Arithmetic.

This is the format used by Motorola.

* NOTE: Solid connection lines represent the most commonly used connections.

Figure 2. Extended and Standard MODBUS Lists

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 31 32

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