AMCI SD17060E2, Руководство пользователя

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M
ODBUS
TCP C
ONFIGURATION
Networked Indexer/Driver User Manual
ADVANCED MICRO CONTROLS INC.
132
6.2 Modbus Addressing (continued)
6.2.2 Host Addressing
Your host controller may not use these basic addressing schemes for communicating over a Modbus connec-
tion. For example, Modicon controllers use addresses starting at 30000 for Input Registers and addresses
starting at 40000 for Holding Registers. GE hosts internally use their %R memory for Holding Registers and
%AI memory for Input Registers.
If this is the case, you will define a mapping between your host controller’s addressing scheme and the zero
based Modbus TCP addresses when you add the SD17060E2 or SD31045E2 to your host controller. Refer to
your host controller’s documentation for information on how to accomplish this.
6.3 AMCI Modbus TCP Stepper Driver Memory Layout
The Stepper Driver has a starting Input Register address of 0 and a starting Output Register address of 1024.
Input Registers hold the data from the driver while Output Registers hold the data to be written to the unit.
Figure T6.1 shows how an AMCI Networked Driver is mapped to the Modbus data reference. The complete
specification for the Modbus protocol can be downloaded at http://www.modbus.org/specs.php.
Figure T6.1 Modbus Data Reference Map
6.4 Supported Number of Connections
All Networked Drivers support seven concurrent connections. When connections exist, the Network Status
(NS) LED on the back of the unit will flash green. The number of blinks indicate the number of active con-
nections. There is a two second break between groups of flashes.
Network Input
Data
Not Implemented
Network Output
Data
LSB and MSB
Numbers
Mapped as:
Discrete Inputs
Holding Registers
Input Registers
Mapped as:
Coils
Holding Registers
Register 1024
Register 1033
16,384 16,399
16,528 16,543
Register 9
144 159
0 15
Register 0