Siemens 420 manual CI Connector Input, signal sink P parameters

3 Functions Issue 07/04

A connector is a value (16 or 32 bit), which can include a normalized quantity (without dimension) as well as also a quantity with associated units. Connectors always refer to functions whereby they are sub-divided into connector inputs and connector outputs (refer to Fig. 3-5). Essentially the same as the binectors, the connector inputs are characterized by a "P" parameter plus attribute "CI" (e.g.: P0771 CI: DAC); while the connector outputs are always represented using an "r" parameter plus attribute "CO" (e.g.: r0021 CO: Smoothed output frequency).

As can be seen from the examples above, connector parameters have the following abbreviations in front of the parameter names:

CI Connector Input, signal sink ("P" parameters)

→The CI parameter can be interconnected with a connector output as source, by entering the parameter number of the connector output (CO parameter) as value in the CI parameter (e.g.: P0771 = 21).

CO Connector Output, signal source ("r" parameters)

→The CO parameter can be used as source for CI parameters. For the particular interconnection, the CO parameter number must be entered in the CI parameter (e.g.: P0771 = 21).

Further, MICROMASTER has "r" parameters where several binector outputs are combined in a word (e.g.: r0052 CO/BO: Status word 1). This feature reduces, on one hand, the number of parameters and simplifies parameterization via the serial interface (data transfer). This parameter is further characterized by the fact that it does not have any units and each bit represents a digital (binary) signal.

As can be seen from the examples of parameters, these combined parameters have the following abbreviation in front of the parameter names:

CO/BO Connector Output / Binector Output, signal source ("r" parameters)

→CO/BO parameters can be used as source for CI parameters and BI parameters:

a)In order to interconnect all of the CO/BO parameters, the parameter number must be entered into the appropriate CI parameter (e.g.: P2016[0] = 52).

b)When interconnecting a single digital signal, in addition to the CO/BO parameter number, the bit number must also be entered into the BI parameter (e.g.: P0731 = 52.3)

Abbreviation and symbol		Name	Function
CI		Connector input	Data flow
		(signal receiver)	Pxxxx
			Function
			CI: ...
CO		Connector output	Data flow
		(signal source)	rxxxx
			Function
			CO: ...
CO		Binector/connector	Data flow
BO		output	rxxxx
		(signal source)	Functions
			CO/BO: ...
Fig. 3-5	Connectors

MICROMASTER 420	Operating Instructions
48	6SE6400-5AA00-0BP0