Specifications

Advanced Configuration Features
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31004624 8/2009
The HMI Blocks in the Island Data Image
Summary
An HMI panel that communicates using the Modbus protocol can be connected to
the CFG port (see page 32) on the NIM. Using the Advantys configuration software,
you can reserve one or two blocks of registers in the data image (see page 107) to
support HMI data exchange. When an HMI panel writes to one of these blocks, that
data is accessible to the fieldbus master (as inputs). Data written by the fieldbus
master (as outputs) is stored in a different reserved block of registers that the HMI
panel can read.
HMI Panel Configuration
Advantys STB supports the ability of an HMI panel to act as:
z an input device, which writes data to the island’s data image that is read by the
fieldbus master
z an output device, which can read data written by the fieldbus master to the
island’s data image
z a combined I/O device
HMI Input Data Exchange
Input data to the fieldbus master can be generated by the HMI panel. Input controls
on an HMI panel might be elements such as:
z push buttons
z switches
z a data entry keypad
To use an HMI panel as an input device on the island, you need to enable the HMI-
to-fieldbus master block in the island’s data image (see page 108) and specify the
number of registers in this block that you want to use for HMI-to-fieldbus master data
transfers. You must use the Advantys configuration software to make these
configuration adjustments.
The HMI-to-fieldbus master block can comprise up to 512 registers, ranging from
register 49488 to 49999. (Your actual register limit will be dictated by your fieldbus.)
This block follows immediately after the standard input data and I/O status process
image (see page 111) block (registers 45392 through 49487) in the island’s data
image.
The HMI panel writes the input data to a specified number of registers in the HMI-
to-fieldbus master block. The NIM manages the transfer of the HMI data in these
registers as part of the overall input data transfer—it converts the 16-bit register data
to a fieldbus-specific data format and transfers it together with the standard input
data and I/O status process image to the fieldbus. The fieldbus master sees and
responds to HMI data as if it were standard input data.