Specifications

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Protocol Parameters SUCOM1 PS4-201 Section 13-3

13.3 Protocol Parameters SUCOM1 PS4-201

The parameters of the interface SER1 are set to the following values:

Baud rate: 300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 375000,

500000 Baud

Data bits: 5, 6, 7, 8

Stop bits: 1, 1.5, 2

Parity: none, even, odd

Handshake: no handshake, hardware, software

The default parameters of the programming system are printed in bold.

13.4 Data Types

M ﬂag bits (bit access)

MB ﬂag bytes (byte access)

MW ﬂag word (word access)

PS process status word (word access)

DS diagnostic word (word access)

DZ diagnostic counter (word access)

13.5 Additional Functions

In addition to the random read and write access to PLC variables, a memory area

comprising 12 bytes is deﬁned in the mask deﬁnition as cyclic poll area.

Only marginal conditions regarding this memory area are that the PLC must be

able to access in bit-mode and the memory area must be contiguous. The starting

address of this memory area must be speciﬁed in the mask deﬁnition and must be

located on a word boundary.

Word-structured Memory Mapping

The data area comprises a maximum of 6 words.

Example: Cyclic data area on MW10

MW High-byte Low-byte

MW10 Write coordination byte Reserved

MW12 Message channel high-byte Message channel low-byte

MW14 LED 1 to 4 LED 5 to 8

MW16 LED 9 to 12 LED 13 to 16

MW18 LED 17 to 20 LED 21 to 24

MW20 LED 25 to 28 LED 29 to 32