Siemens SIMATIC NET Instrukcja Obsługi Pobierz pdf (Strona 83)

Command Interface

5-15

SIMATIC NET CP 243-2 AS-i Master

C79000-G8976-C142/02

5.2.3 Write_Parameter

Purpose of the Command

The AS-i parameter value transferred with the command is passed on to the

addressed AS-i slave.

The parameter is stored on the CP 243-2 only temporarily and is not entered as a

configured parameter in the EEPROM!

The AS-i slave transfers its current parameter value in the reply (parameter echo).

This can deviate from the value that has just been written according to the AS-i

master specification (/2/). The AS-i slave response is supplied as a parameter

echo in the receive buffer.

This call is not permitted for AS-i slaves that comply with the AS-i slave standard

profile 7.4. For these slaves, the AS-i master handles the AS-i slave parameter

assignment itself.

Structure of the Job Data in the Send Buffer

Bank Byte Meaning

Bit 7 Bit 4 Bit 3 Bit 0

2 0 Command number: 02

2 1 AS-i slave address

2 2 irrelevant Parameter

Structure of the Job Data in the Receive Buffer

Bank Byte Meaning

Bit 7 Bit 4 Bit 3 Bit 0

2 0 Echo of the command number: 02

2 1 Command status

2 2 Parameter echo

1 2 ... 78 79 80 81 82 83 84 85 86 87 88 ... 149 150

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Siemens SIMATIC NET Instrukcja Obsługi Strona 83