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HONEYWELL CC-MCAR02 Switch CARDS

There is no direct access to the inputs and outputs of the slave central unit via the CS31 system bus. The communication between master and slave is performed using input and output operands. All the master data are consistently transferred to the slave, and all the slave datas are consistently transferred to the master. The slave central unit can be used either in the binary range or in the word range of the CS31 system bus. The transmit and receive ranges of the slave can be adapted to the application-specific requirements by means of the two system constants KW 00,10 and KW 00,11 (see also chapter 1.4 "Operands" § System constants). You can set : – The size of the transmit and receive ranges and – the mode of employment of the slave (in the binary or the word range).

Default condition

 If the central units 07 KR 31 / 07 KT 31 / 07 KR 91 / 07 KT 92 / 07 KT 93 are switched over to the "slave mode", they behave like binary input and output units with 32 inputs and 32 outputs when connected to the CS31 system bus. This means that the default setting of the transmit and receive ranges is within the binary range of the master. Their size is 32 bits each (4 bytes). Example 1 : Default configuration of the slave (binary range) : KW 00,10 = 0 : Slave transmit range : 4 bytes (4 bytes * 8 channels = 32 binary O) KW 00,11 = 0 : Slave receive range : 4 bytes (4 bytes * 8 channels = 32 binary I) Note : The default configuration is the same as the configuration KW 00,10 = KW 00,11 = 4.

For the slave address of n = 12 the following applies, for example : The output signal A 00,00 of the 07 KR 31 used as slave is the input signal E 12,00 for the 07 KR 31 used as bus master.

Purpose of the I/O configuration

Dependent on the type of I/O units the following can be configured : ● in case of binary I/O units, an input delay different from the factory setting, ● in case of binary units with combined I/O channels, these channels can also be defined as input only or output only, ● in case of binary units, open-circuit monitoring at inputs and outputs, ● in case of analog units, measuring or output ranges which differ from the factory setting. Switching over of inputs and outputs, switching on the diagnosis functions and changing the measuring and output ranges are performed as follows, depending on the unit type : ● Performing the I/O configuration via the CS31 system bus, either by means of the user program of the bus master central unit or by means of a terminal. ● Setting of switches on the plug-in base ECZ or on the rear side of the input/output unit.

● External wiring on the input/output unit terminals. 

In some cases, there is a relation between the settings made on the remote unit and the information and diagnosis messages which can be interrogated at the remote unit or via the CS31 system bus. This relation will be explained in the following chapters. There is no need for you to perform an I/O configuration via the CS31 system bus if the factory setting is sufficient. Once an I/O configuration has been performed, it will remain stored in the corresponding I/O unit until it is changed again. Even in case of power OFF it will not be deleted. All possibilities of the I/O configuration are described in the volume 2 "Hardware description".