Siemens EF 83H Series Instrukcja Użytkownika Pobierz pdf (Strona 55)

Communication Services

4-4

SIMATIC 505 PROFIBUS-FMS CP User Manual

Overview (continued)

The

FMS CP module is registered in the I/O memory map of its controller as

a 4 word input (WX) and 4 word output (WY) Special Function (SF) module.

ou must assign the starting I/O address, as described in Section 2.7, in

order for the programmable logic controller to be able to communicate with

the FMS CP module.

NOTE:

The designations WX1, 2, 3, 4 and WY5, 6, 7, 8, shown in the

COM5434 Configurator

, are relative to the actual starting address that you

assign in TISOFT or SoftShop for the slot where the FMS CP module is

installed. (See Section 2.7.) For example, if you assign 9 as the starting

address, then the programmable logic controller reads WX1, 2, 3, 4, and

WY5, 6, 7, 8 as WX9, 10, 1

1, 12 and WY13, 14, 15, 16. Of course, if you

configure the starting address as 1, the actual addresses match the relative

addresses shown in the COM5434 Configurator

Each bit in the first three words corresponds to a job. For example, if WX1 is

configured as the first word input and WY5 is configured as the first word

output for the module, then bit 1 in WY5 is the Job Start Bit for Job1, while

bit 1 in WX1 is the Job Active Bit for that same Job1 (see Figure 4-1).

WX1

WX2

WX3

WX4

WY5

WY6

WY7

WY8

Each

bit in word inputs 1 to 3 and word outputs 5 to 7 is associated with a job.

16-bit

words

→

PLC

→

Job Start

(WY5, bit 1)

Job Active

(WX1, bit 1)

Start Reset

Job

complete

Acknowledge

1 2 3 4 5 . . .

MSB LSB

116

Figure 4-1 Communication

between the PLC and the FMS CP Module

Communication

between the PLC

and the FMS CP

Module

1 2 ... 50 51 52 53 54 55 56 57 58 59 60 ... 186 187

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