B&B Electronics GW-7552 - Manual - Manual (Page 5)

GW-7552 PROFIBUS/MODBUS GATEWAY User Manual (Version 1.40, Apr/2012) PAGE: 5
1.1 Features
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16-Bit Microprocessor inside with 80MHz
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Siemens SPC3 PROFIBUS controller
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Supports PROFIBUS DP-V0 slave
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PROFIBUS transmission rate detect automatically
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Max transmission speed up to 12M bps for PROFIBUS and 115.2K bps for
COM Port
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Supports Modbus RTU/ASCII format
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Supports Modbus master/slave mode
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Supports safe value setting
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COM Port driver has 1K bytes QUEUE input buffer & 512 bytes QUEUE
output buffer
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Max length of output/input data is 131/128 Bytes
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Built-in self-tuner ASIC controller on RS-422/485 port
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2500Vrms High Speed iCoupler Isolation Protection for PROFIBUS network
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3000VDC Isolation Protection on the PROFIBUS side
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Provide LED indicators
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Built-in Watchdog
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Mountable on DIN Rail
1.2 Modules Support
Only the following Modbus commands are supported by the gateway.
Table 1: Modbus function codes
Code Name Description
01 Read Coil Status Read the ON/OFF status of discrete outputs in the slave
02 Read Input Status Read the ON/OFF status of discrete inputs in the slave
03 Read Holding Registers Read the binary contents of holding registers in the slave
04 Read Input Registers Read the binary contents of input registers in the slave
05 Force Single Coil Write a single output to either ON or OFF in the slave
06 Preset Single Register Write an integer value into a single register in the slave
15 Force Multi. Coils
Write each coil in the sequence of coils to either ON or
OFF in the slave
16 Preset Multi. Registers Write a block of contiguous registers in the slave
1.3 Specification
COM Port specs:
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Serial port - RS-232/RS-422/RS-485
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Serial port interface: 14-pin screw terminal block