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4-10 Series 90™-30 PROFIBUS Slave Module User's Manual – August 2004 GFK-2193A
4
Read Module Header (5)
The Read Module Header command retrieves Network Diagnostic Information for the
Device.
Read Module Header Command Block – Basic Example
The following command block accomplishes the following:
Get Module Header Data
Return the COMMREQ Status Word to %R10—%R13.
Return the Device Status to %R251—%R275.
Word Dec (Hex) Definition
Word 1 4 (0004) Length of command Data Block
Word 2 0 (0000) Always 0 (no-wait mode request)
Word 3 8 (0008) Memory type of COMMREQ status word (%R)
Word 4 9 (0009) COMMREQ status word address minus 1 (%R10)
Word 5 0 (0000) Reserved
Word 6 0 (0000) Reserved
Word 7 5 (0005) Read Module Header command number
Word 8 8 (0008) Memory type to write response (%R)
Word 9 250 (00FA) Starting Address to write response(response written to %R251)
Word 10 25 (0019) Size of response area, 25 for slave
(Word 7) Command Code: Word 7 specifies the Command code for the COMMREQ to
be executed . Read Module Header = 5
(Word 8) Local PLC - Memory Type: Words 8—9 specify the location in the PLC where
the response will be written. Valid values for Word 8 are listed below:
Type
Value
Dec (Hex)
Description
%R 8 (0008) Register memory (word mode)
%AI 10 (000A) Analog input memory (word mode)
%AQ 12 (000C) Analog output memory (word mode)
%I 16 (0010) Discrete input memory (byte mode)
%Q 18 (0012) Discrete output memory (byte mode)
%T 20 (0014) Discrete temporary memory (byte mode)
%M 22 (0016) Discrete momentary internal memory (byte mode)