ProSoft Technology ILX69-PBM User Manual page 74

Communication
User Manual
Handshake Acknowledge Bits
Bit Data
Offset Type
0 BOOL
1 BOOL
2 BOOL
3 BOOL
4 BOOL
5 BOOL
6 BOOL
7 BOOL
The Handshake Acknowledge Bits provide an indication to a command that has been
processed. Every handshake acknowledge bit has a corresponding handshake request
bit. A command can be triggered by setting the corresponding handshake request bit in
the device command register of the output array. If the handshake acknowledge bit is
equal to the corresponding handshake request bit, the command has completed and the
user program can begin the next command. If unequal, the command is still being
processed.

HsAck0 – Handshake Acknowledge 0
This bit indicates the processing of a slaveDiag request. If this bit is equal to
SlvDiagReq in the Command register, the command has been processed. If unequal,
the command is still in progress.

HsAck1 – Handshake Acknowledge 1
This bit indicates the processing of a Global Control request. If this bit is equal to
GlbCtrlReq in the Command register, the command has been processed. If unequal,
the command is still in progress.

HsAck2..7 – Handshake Acknowledge 2 ... 7
Reserved for future use.
Paging Mechanism / Block Transfer
The PLC program controls the block transfer of input and output data. The block transfer
uses 2 bytes of the output data area and 2 bytes of the input data area. These byte pairs
are located in the "Command Register" and "Status Register" area of the Input and
Output image. Transferring input and output data is independent from each other. This
allows exchanging process data using ladder logic even if the input and output size differ
from each other.
The PLC program flows as: Update inputs > Process data > Update outputs
Page 74 of 113
ILX69-PBM ♦ CompactLogix™ or MicroLogix™ Platform
Structure Description
Member
HsAck0 SlvDiagCnf , Slave Diag Confirmation
HsAck1 GlbCtrCnf , Global Control Confirmation
HsAck2 Reserved, set to 0
HsAck3 Reserved, set to 0
HsAck4 Reserved, set to 0
HsAck5 Reserved, set to 0
HsAck6 Reserved, set to 0
HsAck7 Reserved, set to 0
PROFIBUS Master Communication Module
ProSoft Technology, Inc.