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VACON® 1000 Fieldbus Options
Operating Guide
•
Fast Output:
-
Valid only in Change of Value - write command mode.
•
Response Timeout Processing:
-
The processing mode when the gateway does not receive the response within response wait time (set in "Response Time-
out" of the subnet).
-
Clear: Sets the response data in the input buffer to zero.
-
Hold: The data in the input buffer remains the same.
7.5.3 Subnet Configuration - Modbus Slave
•
Baud Rate: 300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600, or 115200 bps
•
Data Bits: 7 or 8
•
Parity Check: None, Odd, Even, Mark, or Space
•
Stop Bits: 1 or 2
•
Slave Address: 0–247
•
Transmission Mode: RTU or ASCII
•
I/O Channel Status Word:
-
In Modbus Master and User Config mode (Poll mode of Output mode only), each command has 1 bit data to indicate the
execution status.
-
The bit is 1 when the command status is normal, otherwise is 0.
-
The length of the status word is 2 bytes.
-
In Modbus Slave and Customer Protocol mode, the 2-byte word is used to indicate the number of times the frame has been
correctly received.
•
Byte Swap:
-
There are 4 modes of Byte Swap: No swap, Double-byte swap, Four-byte swap, and Four-Byte Big-endian and Little-endian
Swap.
-
Double-byte swap: The high and low bytes of 2 bytes (one register) are exchanged, for example, 0x1234–0x3412.
-
Four-byte swap: The first 2 bytes are exchanged with the last 2 bytes, for example, 0x12345678–0x56781234.
-
Four-byte Big-endian and Little-endian Swap: for example, 0x12345678–0x78563412.
7.5.4 Subnet Configuration - Custom Protocol
•
Baud Rate: 300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600, or 115200 bps
•
Data Bits: 7 or 8
•
Parity Check: None, Odd, Even, Mark, or Space
•
Stop Bits: 1 or 2
•
I/O Channel Status Word:
-
In Modbus Master and User Config mode (Poll mode of Output mode only), each command has 1 bit data to indicate the
execution status.
-
The bit is 1 when the command status is normal, otherwise is 0.
-
The length of the status word is 2 bytes.
-
In Modbus Slave and Customer Protocol mode, the 2-byte word is used to indicate the number of times the frame has been
correctly received.
•
Byte Swap:
-
There are 4 modes of Byte Swap: No swap, Double-byte swap, Four-byte swap, and Four-Byte Big-endian and Little-endian
Swap.
-
Double-byte swap: The high and low bytes of 2 bytes (one register) are exchanged, for example, 0x1234–0x3412.
-
Four-byte swap: The first 2 bytes are exchanged with the last 2 bytes, for example, 0x12345678–0x56781234.
-
Four-byte Big-endian and Little-endian Swap: For example, 0x12345678–0x78563412.
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