Intelligent Technologies Modbus to QCPort Adapter Manual
January 2006
MN05002002E (C)
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Page 32
Modbus Register Mapping
Table 29 Modbus Register Mapping
Register Name
Starting Register
(Dec)
Length (Dec)
Bytes (Dec)
Production Data (Read Only)
0x0001 (1)
0x0400 (1024)
0x0800 (2048)
Consumption Data
(Read/Write)
0x0401 (1025)
0x0400 (1024) 0x0800
(2048)
Control (Read/Write)
0x0801 (2049)
0x0100 (256)
0x0200 (512)
Status (Read Only)
0x0901 (2305)
0x0350 (848)
0x06A0 (1696)
Registry (Read/Write)
0x0C51 (3153)
0x1000 (4096)
0x2000 (8192)
Scan List (Read)
0x1C51 (7249)
0x0100 (256)
0x0200 (512)
Configuration (Read)
0x1D51 (7505)
0x0100 (256)
0x0200 (512)
Data Copy Area (Read/Write) 0x1E51 (7761)
0x1000 (4096)
0x2000 (8192)
Special Function Registers
0x2E51 (11857)
0x1000 (4096)
0x2000 (8192)
Control Registers
There are two control registers that control the scan of the QCPort devices and two
words that provide status of the QCPort channels.
Channel Scan Registers (Read/Write)
Table 30: Output Control Register
Bit Name
Description
Register 2049 Channel A
0 – IO scan will not occur on the selected channel and
all devices will exhibit their communication loss action
and be offline.
0
Active Scan
Channel A
1 – IO scan will occur on the selected channel, the
devices will be online and operating in an online state.
1 – 15
Reserved
Register 2050 Channel B
0 – IO scan will not occur on the selected channel and
all devices will exhibit their communication loss action
and be offline.
0
Active Scan
Channel B
1 – IO scan will occur on the selected channel, the
devices will be online and operating in an online state.
1 – 15
Reserved
A duplicate combined scan control register is located at register 1025, prior to the
consumption data. This single register provides for ease of control since this register is
just one before the output registers.
