The RioFaDigitalChannelGroupType aggregates RioFaDigitalInputChannelType Objects and RioFaDigitalOutputChannelType Objects. Alternatively, the server can omit the channel objects and provide Input- and Output image Variables only.

Table 28 – RioFaDigitalChannelGroupType Definition

Attribute	Value
BrowseName	RioFaDigitalChannelGroupType
IsAbstract	False
References	Node Class	BrowseName	DataType	TypeDefinition	Other
Subtype of the RioChannelGroupType.
HasRioProcessVariable	Variable	InputImage	RioBitFieldDataType	RioBitFieldVariableType	O, RO
HasRioProcessVariable	Variable	InputImageQualifiers	RioBitFieldDataType	RioBitFieldVariableType	O, RO
HasRioProcessVariable	Variable	OutputImage	RioBitFieldDataType	RioBitFieldVariableType	O, RO
HasRioProcessVariable	Variable	OutputImageQualifiers	RioBitFieldDataType	RioBitFieldVariableType	O, RO
Conformance Units
PNRIO Channel Groups

The InputImage Variable contains a bit field. The bit field contains the copy of one Input Telegram’s memory image associated with one PnIoSignalType Object. The InputImage Variable is linked to the associated PnIoSignalType Object using a 0:RepresentsSameEntityAs Reference.

The InputImageQualifiers Variable contains a bit field containing the qualifier bits for each bit in the InputImage Variable. The InputImageQualifier Variable is linked to the associated PnIoSignalType Object using a 0:RepresentsSameEntityAs Reference.

The bit numbers must be equal to the RioChannelNumber of the represented Input Channels. The RioChannelNumbers of the Input Channels shall have the value range 0 to <number of Input Channels > minus 1.

The OutputImage Variable contains a bit field. The bit field contains the copy of one Output Telegram’s memory image associated with one PnIoSignalType Object. The OutputImage Variable is linked to the associated PnIoSignalType Object using a 0:RepresentsSameEntityAs Reference.

The OutputImageQualifiers Variable contains a bit field containing the qualifier bits for each bit in the OutputImage Variable. The OutputImageQualifier Variable is linked to the associated PnIoSignalType Object using a 0:RepresentsSameEntityAs Reference.

The bit numbers must be equal to the RioChannelNumber of the represented Output Channels minus the number of Input Channels. The RioChannelNumbers of the Output Channels shall have the value range <number of Input Channels > to <number of Input Channels + number of Output Channels > minus 1.

If the number of RIO Channels the RIO Channel Group represents exceeds the capacity of the RioBitFieldVariableType (which is 32), as many RioBitFieldVariableType Variables shall be part of the RIO Channel Group Object as are needed to represent the qualifiers of all RIO Channels.

The BrowseNames of the RioBitFieldVariableType Variables shall be extended with a suffix ensuring uniqueness and indicating the section of the bitfield the variable represents in this case, e.g. “_0_31”, “_32_47”, and so on.

The optional Offset Property of the RioBitFieldVariableType Variables shall be provided in this case and contain the start of the range the RioBitFieldVariableType Variable represents. Possible Values for Offset are 0, 32, 64, and so on. The Offset Value added to the bit number shall be used as the RioChannelNumber of the corresponding RIO Channels. For bit fields representing Output Channels the number of Input Channels must be added also to obtain the RioChannelNumber of the represented Output Channel (see above).