Lenze 339405 8606_E.1B.11 Systembus CAN Communication Module

Configuration of the Lenze 339405 (8606_E.1B.11) module is handled through a combination of physical hardware switches and software tools. Onboard hardware DIP switches allow engineers and technicians to assign the node ID and establish the transmission rate between 20 kbit/s and 500 kbit/s prior to powering up the module. Hardware settings must be configured correctly before inserting the module into the host drive's function interface slot to prevent network communication errors.

Software-based parameter management and advanced diagnostic monitoring are conducted using Lenze Global Drive Control (GDC) software or a host drive mounted Lenze XT keypad. Through these interfaces, engineers can adjust Systembus monitoring parameters, set watchdog timeouts, and monitor process data objects (CAN-IN1 through CAN-IN4). Proper synchronization between the host drive's internal settings and the module's DIP switch setup ensures reliable data exchange across the fieldbus network.

The 339405 Systembus module operates on the ISO 11898 CAN physical layer standard, enabling masterless peer-to-peer data exchange across Lenze frequency inverters and servo controllers. By allowing direct drive-to-drive speed and torque synchronization without relying on a central master PLC, the module significantly reduces network overhead and control system latency. Physical fieldbus connections are terminated using plug-in terminal blocks or Sub-D socket connectors.

System integration requires adherence to standard CAN bus architecture, including proper shield grounding and correct network termination. A 120 Ohm terminating resistor must be installed at both physical ends of the Systembus network line to maintain signal integrity and prevent bus reflection errors. The module supports flexible baud rates ranging from 20 kbit/s up to 500 kbit/s, which must be uniformly configured across all connected nodes on the bus segment.

Visual monitoring of the 339405 communication module is performed via two integrated LED indicators labeled RUN and ERR. The green RUN LED illuminates continuously when Systembus operation is active and telegrams are transmitting correctly. Conversely, the red ERR LED indicates communication disturbances, including bus-off states, wiring errors, baud rate mismatches, or bus collisions. If the red ERR LED stays continuously lit in the absence of bus activity, an internal hardware fault is indicated.

Extended diagnostic monitoring is accessible directly through the host drive using a Lenze XT keypad or via Lenze Global Drive Control (GDC) software. Systembus diagnostic registers maintain error counters and report specific fault states, enabling technicians to pinpoint connection losses or watchdog timeout conditions across individual process data objects.

Status LED Indicators

The Lenze 339405 (8606_E.1B.11) Systembus module has reached discontinued status by the manufacturer. While it remains vital for maintaining existing machinery operating with Lenze 8600 series inverters and 2100 series servo drives, direct replacement requires careful verification of node addresses and baud rate settings on the onboard DIP switches prior to installation into the host FIF slot.

When replacing a faulty module, match all hardware DIP switch settings to the existing unit to maintain network parity. Verify that the bus termination resistors (120 Ohm) are intact at the end nodes of the segment. For new system designs or extensive retrofits, the EMF2171IB serves as the manufacturer's recommended functional successor series.

The following error codes may be displayed during operation or diagnostics: