B&B Electronics GW-7553 - Manual - Manual (Page 32)

GW-7553 PROFIBUS/Modbus TCP Gateway User Manual (Version 1.00, Dec/2008) PAGE: 32
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Input module：Input Relay/Coil => 1~32 Bytes
Input Register => 1~64 Words
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Max. length of I/O data：259 Bytes
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Output length：0~131 Bytes
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Input length：0~128 Bytes
The modules have module parameters about the communication settings. The
module parameters are shown in the below：
A. Output Relay/Coil module parameters：
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Modbus Slave Device ID(M)：0~247
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Start Address(M)：0~65535
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NO. of Relay/Coil(M)：8*(n-1)+1 ~ 8*n Bits
n=Module size/Byte
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TCP_Connect_Index(T)(M)：1~8
B. Output Register module parameters：
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Modbus Slave Device ID (M)：0~247
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Start Address(M)：0~65535
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TCP_Connect_Index(T)(M)：1~8
C. Input Relay/Coil module parameters：
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Modbus Slave Device ID (M)：0~247
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Start Address(M)：0~65535
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NO. of Relay/Coil(M)：8*(n-1)+1 ~ 8*n Bits
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Module Type(M)：Read DI/DO
n=Module size/Byte
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TCP_Connect_Index(T)(M)：1~8
D. Input Register module parameters：
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Modbus Slave Device ID (M)：0~247
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Start Address(M)：0~65535
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Module Type(M)：Read AI/AO
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TCP_Connect_Index(T)(M)：1~8
Example 1:
If the user wants to read a Modbus digital input module (DI module), Device ID is
1, data address is 10010~10019, and data count is 10 via the first TCP connection.
In this case, the user can select an “Input Relay/Coil=> 2 Bytes module”, module
parameters are shown in the below: