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[2026/07/15] <3.3.02.2026>
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Add: Updated 7186EL.LIB to support new flash 39VF040.

Chg: PDS-721 set I/O wait states to 2.

Fix: Fixed an issue where M9/M10 might affect the ModbusType setting of M3.

Fix: Fixed an issue where DBTL and EndChar were not set properly in M9/M10.

Fix: Fixed network disconnection issue after failed renewal.

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[2025/08/25] <3.3.02.49>
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Add: Supported M9/M10 modes (bypass Modbus RTU/ASCII to COM X).

Add: Displayed FW version date in UDP search responses.

Add: Added console commands: "dhcp=2" to restart DHCP, and "arp reset" to clear and reset the ARP table.

Chg: In M7/M8 modes, Modbus commands from COM ports are forwarded only after a remote connection is established; commands received before connection establishment are discarded.

Chg: Modified UDP search response settings:
     UDP search=1: Always enabled.
     UDP search=2: Enabled until another client connects.
     UDP search=3: Direct response within the same subnet; broadcast response for different subnets.

Fix: Fixed an issue in M3 mode where UDP port 502 did not handle the last COM port properly.

Fix: Fixed an issue where M9/M10 settings did not take effect immediately.

Fix: Fixed an issue where commands forwarded from M9 to M5 failed to convert to Modbus/ASCII.

Fix: Fixed an issue where commands forwarded from M10 to M4 failed to convert to Modbus/RTU.

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[2024/07/02] <3.3.02.48>
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Chg: COM1/COM2 no longer support 2 stop bits and mark/space parity.

Add: Supported M7/M8 modes (Modbus RTU/ASCII to TCP).

Add: Automatically sent ARP packets upon connecting to the network.

Add: Added option '0' to FTL in COM port settings, indicating no change.

Fix: Fixed IP filter configuration issues.

Fix: Fixed read-only setting issues on the MISC page.

Fix: Fixed Lock EEPROM configuration issues.

Fix: Fixed abnormal display on the COM port page when configuring M3/M7/M8 modes.

Fix: Fixed an issue where modifying Slave Timeout in COM port Settings failed to synchronize with M3 Slave Timeout.

Fix: Fixed DI reading anomaly on PDS-721.

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[2023/12/28] <3.3.02.47>
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Add: Supported M6 mode (Echo back mode).

Add: Added display for current IP/MASK/GATEWAY on the TCPIP settings page.

Fix: Fixed an issue in M3 mode where responses from the COM port side could be split into two segments, causing exception responses to be returned to the TCP side.

Fix: Fixed trigger conditions for COM port timeout.

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[2021/08/04] <3.3.02.42>
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Chg: Changed console prompt to "VCOM3302".

Chg: Automatically redirected to the "Firmware Information" page after logging out.

Fix: Fixed an issue in M3 mode where the local COM callback function was incorrectly configured, leading to missing response messages and causing the COM port to freeze.

Fix: Adjusted connection state when switching from other modes to M3 mode.

Fix: Fixed an issue where the password modification item was missing on the Misc page.

Fix: Fixed an issue where "[]Restore to Factory Default Settings" was missing on the Misc page.

Fix: Fixed an issue where data size > 1460 bytes sent from TCP caused data to get stuck in the buffer and unreadable.

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[2021/04/27] <3.3.02.3>
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Add: Automatically logs out after 300 seconds of disconnection or inactivity.

Add: Supported M4 mode (Modbus/TCP to Modbus/RTU gateway).

Add: Supported M5 mode (Modbus/TCP to Modbus/ASCII gateway).

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[2021/02/23] <3.3.02.1>
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Chg: Enforced password setup on initial web configuration and restricted access to setup pages until successful login.

Add: Supported up to 5 concurrent IP connections for configuration.

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[2018/05/08] <3.3.01.11>
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Chg: Allowed Modbus ID range to be set from 1 to 255.

Fix: Fixed incorrect ID offset restoration when processing certain exception responses.

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[2017/12/22] <3.3.01.10>
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Fix: Fixed an issue where PDS-220FT became unlinked and lost communication after a period of inactivity.

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[2017/09/28] <3.3.01.9>
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Fix: Fixed an issue in M2 mode where data could be mistakenly sent to other TCP connections after closing the COM port TCP connection.

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[2017/04/19] <3.3.01.7>
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Chg: When the ID exceeds the configured range, it is not forwarded via COM port and directly returns exception code 0x0A.

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[2017/04/18] <3.3.01.6>
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Fix: Fixed an issue in v3.3.01.5 where the Modbus gateway function could not be used on DS-715.

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[2017/04/14] <3.3.01.5>
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Fix: Fixed Modbus gateway communication failure on COM1.

Add: Supported new hardware X511i.

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[2016/04/12] <3.3.01.4>
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Add: Supported Modbus gateway functionality.

Add: Added ID offset feature to Modbus gateway.

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[2015/06/16] <3.3.01.3>
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Chg: Retained only COM1 in Com Port Settings for DS-715.

Chg: Changed console prompt to "VCOM3301".

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[2015/05/27] <3.3.01.2>
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Add: Minimum configurable baud rate setting extended to 300.
