Bonfiglioli EM-IO-04 Expansion Module Configuration Guide
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Au:FANS
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DA:2026-08-31
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In industrial variable frequency drive systems, flexible digital expansion, motor temperature monitoring, and system bus communication capabilities are often the key factors determining project success or failure. Bonfiglioli provides EM-IO-04 expansion modules for ACT and ACU series inverters, integrating programmable digital ports, dual digital inputs, PTC/KTY temperature sensing interfaces, and CAN system bus, providing engineers with a one-stop I/O and communication expansion solution. This article is based on the official technical manual, and systematically elaborates on the engineering application points of this module from the dimensions of hardware installation, system bus configuration, process data mapping, digital quantity configuration, and motor temperature protection, to help on-site engineers quickly complete deployment and fault diagnosis.
F2210 CAN bus BUS OFF Check if the bus line is short circuited/open circuited, if the baud rate is consistent, and if the terminal resistance is correct
Debugging skills:
By using VPlus software (in conjunction with KP232), real-time monitoring of node status (978) and CAN physical layer status (979, OKAY/WARNING/BUS-OFF) can be achieved.
If the bus load is too high (>70%), the PDO transmission frequency should be reduced or the baud rate should be increased to avoid message conflicts.
