Representations and Parameters

FBD Representation

LD Representation

IL Representation

Representation:

LD Address

OUT_IN_MBUS AD, MC, RL, DB, AB, MDA, RT, AC, DO, ERR, ST

ST Representation

Representation:

OUT_IN_MBUS(AD, MC, RL, DB, AB, MDA, RT, AC, DO, ERR, ST);

Parameter Description

The following array describes the input parameters:

Parameter	Type	Comment
`ADDR`	`ADDR_TYPE`	Information on the address of the communication port of the slave device. This address must be in the following form: ADDR(’r.m.c.SYS’). Abbreviations Used: r = rack, m = module slot, c = channel.
`MBUSCMD`	ARRAY [1.. 4] OF `INT`	Modbus array definition
`RETRYLMT`	`INT`	Number of attempts to send a message made by the block
`DATABITS`	`BOOL`	Modbus Messages to send in ASCII mode (DATABITS =0) or RTU mode (DATABITS=1).
`RESPTOUT`	`INT`	Block wait time.
`ABORT`	`BOOL`	DFB cancel bit.

The following array describes the input/output parameter:

Parameter	Type	Comment
`MASTERDATAAREA`	ARRAY [x.. y] OF `INT`	Data area of the master PLC

NOTE: In order to read one of the last 8 bits of the memory it is necessary to read all the last 8, otherwise the function sends back an error status report. Then it possible to extract the bit needed.

NOTE: The input/output parameter uses a dynamic array, you must in this case check in Control Expert Allow dynamic arrays [ANY_ARRAY_XXX] under tool > project option > language extension.

The following array describes the output parameters (read only):

Parameter	Type	Comment
`RETRY`	`INT`	The value displayed indicates the current number of attempts made by the block.
`ACTIVE`	`BOOL`	The value 1 indicates that an operation is in progress.
`DONE`	`BOOL`	The value 1 indicates that the operation is completed.
`ERROR`	`BOOL`	The value 1 indicates that an error has occurred.
`STATUS`	`INT`	The value displays a status code generated by the block.