ProSoft Technology PS69-DPM - Manual (Page 69)

PS69-DPM ♦ CompactLogix or MicroLogix Platform Contents
PROFIBUS DPV1 Master User Manual
ProSoft Technology, Inc. Page 69 of 130
October 1, 2014
PROFIBUS Input Data
The remainder of the input area is used for PROFIBUS input data from connected Slaves.
The input information is transferred from the module to the controller. Input data from the
PROFIBUS system always starts at the 88th Byte (based on start index 0) in the input
region. Thus, the module has a maximum of 408 bytes input data (496 byte input region
–
88 byte status). The input data of the Slaves are linear corresponding to the I/O Mapping
assigned by PROSOFT.fdt (SYCON.net). PROSOFT.fdt (SYCON.net) is capable of
configuring more than 408 Bytes of input data. Should the input data of the system exceed
408 bytes, only the first 408 bytes of the input data will be transferred to the controller.
3.1.3 Output Array
Device Command Register
The Device Command register is transferred from the controller to the module via the output
region. The Command register always lies in the first 4 bytes of the output region. The
following tables describe the mapping for the Device Command Register.
Byte Offset Structure Member Data Type Description
0 MCB SINT Module Command Bits
1 HSR SINT Handshake Request Bits
2 Reserved INT Reserved
3 Reserved INT Reserved
MCB := Module Command Bits
Bit Offset Structure Member Data Type Description
0 Reserved BOOL Reserved
1 Reserved BOOL Reserved
2 Reserved BOOL Reserved
3 Reserved BOOL Reserved
4 Reserved BOOL Reserved
5 NRDY BOOL Application Not Ready
6 INIT BOOL Init
7 RST BOOL Reset
NRDY := Not Ready
With this bit, the user program can start or stop communication with the PROFIBUS system.
When this bit is set, the communication between the master module and all Slave devices is
stopped. All slaves go to fail safe mode and the Master goes to Stop mode. This control bit
allows the user program to make a controlled start of the communication with the
PROFIBUS system.
INIT := Init
This function is not implemented.