What are some potential problems when attempting to configure a CPT213B device?
Timing is critical during configuration of the CPT213B. You must make sure to adhere to the timing specifications in the I2C Configuration Interface Table in the device's datasheet. Each command must have this delay after it before sending any further command to the device.
When writing the configuration to the device, there is no maximum delay timing between write commands. So the IEC host can do any diagnostics it needs to between writes.