Rockwell-automation 1794-APB/B FLEX I/O PROFIBUS Adapter Module User M Manual de usuario descargar pdf (Pagina 100)

4–8 Configure the Adapter for Master/Slave Communication

2!*(" 1(-, 7  -3$+!$/ 

On a PROFIBUS DP network, the I/O data exchanged between the

PROFIBUS DP master and a DP slave is encapsulated into logical

modules. The total I/O data exchanged between a PROFIBUS DP

master and a DP slave device comprises a set of logical modules

which is defined in the check configuration data.

Each physical slot of the FLEX I/O system is represented by two

logical modules (one input and one output). When the FLEX I/O

adapter is powered-up, the check configuration message configures

the module format (input and output words) and defines the size of

the modules within the device. When the sizes are configured, the

I/O data can be optimized to remove unused data from the data

stream.

Both input and output sizes can be configured. If a slot is empty, or if

either the input or output module is zero length, the specific

identifier for an empty module (free place) must be used.

If the end of the identifiers is reached before all slots have been

configured, the remaining slots are configured as empty.

The first two modules allocated are for the adapter itself, and must

always be a 1 word input module and a 1 word output module,

regardless of what parameter format you choose. The adapter uses

these words for adapter status information. Modules for each of the

individual slots (FLEX I/O modules) must also follow these word

assignments.

The format of the adapter status word is defined in the following

table:

Adapter Status Word

Input Status Word

Bit Position Name Description

 ##/$00 ' ,&$ '(0 !(1 (0 0$1 4'$, 1'$ -#$ ##/$00 04(1"' (0

"' ,&$# 0(,"$ .-4$/ 2.

 $0$/3$# $,1 0 6$/-$0

  -#2*$

 2*1



'(0 !(1 (0 0$1 4'$, , $//-/ (0 #$1$"1$# (, 0*-1

.-0(1(-, !(10  /$%$/ 1- 0*-10 

Output Status Word

Bit Position Name Description

 $0$/3$# $,1 0 6$/-$0



 -#2*$  2*10 /$ " 20$# !5

• 1/ ,0+(00(-, $//-/0 -, 1'$   ! ").* ,$

• ! # +-#2*$

• /$+-3$# +-#2*$

• (,"-//$"1 +-#2*$ (,0$/1$#

The adapter expects the identifier area for each of the eight FLEX

I/O slots to be 2 bytes. The DP input/output identifier and all specific

DP identifiers (except the empty module) are not supported.

Entering Check

Configuration Data

1 2 ... 95 96 97 98 99 100 101 102 103 104 105 ... 123 124

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Rockwell-automation 1794-APB/B FLEX I/O PROFIBUS Adapter Module User M Manual de usuario Pagina 100

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