Details of the explicit exchange objects of the T_COM_ASI

At a Glance

This part presents the explicit exchange objects of T_COM_ASI_V1 type IODDTs that apply to the AS-i bus. It includes word type objects whose bits have a special meaning. These objects are presented below.

Example of declaration of a variable: IODDT_VAR1 of type T_COM_ASI_V1

Notes

The meaning of a bit is generally given for the status of the bit when set to 1. In specific cases an explanation is given for each status of the bit.
Not all bits are used.

Execution indicators for an explicit exchange: EXCH_STS

The table below shows the meaning of channel exchange control bits EXCH_STS (%MWr.m.c.0).

Standard symbol	Type	Access	Meaning	Address
STS_IN_PROGR	BOOL	R	Reading current channel status words.	%MWr.m.c.0.0
CMD_IN_PROGR	BOOL	R	Command parameters exchange in progress.	%MWr.m.c.0.1
ADJ_IN_PROGR	BOOL	R	Adjust parameters exchange in progress.	%MWr.m.c.0.2

Explicit exchange report: EXCH_RPT

The table below shows the meaning of the exchange report bits EXCH_RPT (%MWr.m.c.1).

Standard symbol	Type	Access	Meaning	Address
STS_ERR	BOOL	R	Channel status words reading error.	%MWr.m.c.1.0
CMD_ERR	BOOL	R	Command parameter exchange error.	%MWr.m.c.1.1
ADJ_ERR	BOOL	R	Adjust parameter exchange error.	%MWr.m.c.1.2

NOTE: If the explicit exchange does not last as long as the PLC task cycle time, the %MWr.m.c.0.0 bit never changes to 1.

Standard channel faults, CH_FLT

The table below shows the meanings of the bits of the CH_FLT (%MWr.m.c.2) status word. Reading can be done via a READ_STS (IODDT_VAR1).

Standard symbol	Type	Access	Meaning	Address
SLAVE_FLT	BOOL	R	One or more device faulty.	%MWr.m.c.2.1
ASI_CONF_FLT	BOOL	R	Physical configuration different from software configuration.	%MWr.m.c.2.3
INTERNAL_FLT	BOOL	R	Internal error or channel self-test.	%MWr.m.c.2.4
CONF_FLT	BOOL	R	Hardware or software configuration fault.	%MWr.m.c.2.5
COM_FLT	BOOL	R	Problem communicating with the PLC.	%MWr.m.c.2.6
APPLI_FLT	BOOL	R	Application fault (adjustment or configuration fault).	%MWr.m.c.2.7

AS-i specific status.

The table below presents the meanings of the (%MWr.m.c.3) status word bits (%MWr.m.c.2). Reading can be done via a READ_STS(IODDT_VAR1).

Standard symbol	Type	Access	Meaning	Address
ASI_SUPPLY_FLT	BOOL	R	AS-i power supply fault.	%MWr.m.c.3.6