Allen Bradley InterBus Module Configuration Guide

Character 0: CR=2 (the first slave station in the network)

Word 1: Index 0x5FF9 (write parameter)

Word 2: Sub index 0x1E (parameter 30)

Word 3: Number of bytes to be written=2 (two bytes)

Word 4: Written data=0x50

Input buffer (M1 offset) returns: 4 4 2 0 2 11E... - indicates success (result code 0), and parameter properties are read back (0x011E).

4. Example of reading parameters (reading parameter 8- radiator temperature)

Send: 2 5FF0 8 0... (index 0x5FF0, sub index 8)

Return: 4 4 2 0 2 45 .. - Data 0x45=69, indicating that the radiator temperature is below normal (typically below 69 ° C).

5. Pay attention to error codes: If parameter access fails, a non-zero error code will be returned, such as parameter value exceeding limit (error 4), driver running during write operation (error 10), invalid parameter number (error 20), etc. We need to check the conditions and retry.

Integration example: SLC500+SST IBS SLC scanner

In order to effectively control 160-IB1, it is common to use Phoenix IBS CMD software to configure the InterBus network and write a ladder diagram in RSLogix500.

1. Network configuration (IBS CMD)

Create a new project and set the communication path (e.g. COM19600 baud, connect to SST scanner).

Select the scanner type as "IBS USC (4K)".

Execute 'Configuration frame' → 'Read in' to automatically detect devices on the network. You should be able to see a node labeled "DRIVECOM assembly" (library ID 227).

In "Parameterization", select "Startup without PDP" and cancel "start data transmission".

After saving the configuration, the BA LED of the module should turn green and remain on.

2. I/O memory mapping

The scanner is located in slot 3 of the SLC rack. According to the address monitor, the output data starts at O: 3.0 and the input starts at I: 3.0.

Output 3 words: O: 3.0=control word, O: 3.1=speed reference, O: 3.2=diagnosis.

Enter 3 words: I: 3.0=status word, I: 3.1=speed feedback, I: 3.2=diagnosis.

3. Ladder diagram control logic

In SLC, use the MOV instruction to transfer control words (such as 16 # 000F) to O: 3.0 and speed reference (RPM value) to O: 3.1.

Read the status bit of I: 3.0 to determine whether the driver is ready, running, faulty, etc.

Fault reset: Set bit 7 of O: 3.0 from 0 to 1 and then clear it to 0 (for example, by using a timer to complete the pulse).

4. PCP parameter reading and writing program segment

Configure the G file for SST scanner: Set the length of the M file to 384 words and the length of the G file to 7 words. In G file data, Word1 bit12=1 (PCP enabled), Word5=225 (M file separation point), Word6=command buffer size.

In the ladder diagram, use the COP instruction to copy the 10 words starting from N7:70 to M0:3.225 (output PCP request), and then set the trigger bit for the scanner to process; After completion, copy M1:3.225 back to N7:80 to read the response.

Analyze the result code and data in the response according to the protocol.

Troubleshooting and Common Problems

1. Diagnosis of LED indicator light

Solution to the Meaning of LED Color Status

RC yellow light=input cable connection is normal. If it is off, check if the power supply, network cable, and previous device are online.

BA green light=bus activation/data exchange off: Check the configuration of the InterBus master station to ensure that the network is started.

TR green flashing/on=PCP communication active. If it is off and parameter access is required, check the PCP initialization settings of the main station.

RD red light=Remote bus disabled (output cable missing). If the local machine is a network endpoint node, this is normal; Otherwise, check the cable and reset the main station.

FLT red light=drive fault read fault code (P07 or Object 603F), handle according to the following table.

2. Common driver fault codes (partial)

Fault code (decimal) description and solution

03 Check the input power supply for power failure to ensure stable voltage.

04 Under voltage as above, or check the DC bus capacitance.

05 Extend deceleration time due to overvoltage, or install a braking unit.

07 Motor overload reduces load and prolongs acceleration time.

12. Overcurrent check for output short circuit and motor insulation.

38-40 short circuit to ground (U/V/W) inspection of motor and cable insulation.

41-43 output phase to phase short circuit check output wiring.

46. Intermittent phase loss inspection for external short circuits or motor windings.

3. Network communication error codes

Error code description and solution

7510 serial interface timeout confirmation: The frequency converter is of type C or above. Check if the 30 pin connector is securely plugged in and if the parameters P46/P59 are set correctly.

There is no activity on the 7520 bus. Check the InterBus cable, reset the master station, and confirm that the module is connected to the bus (IN port).

The 5000 drive model invalid frequency converter must be 160 SSC series C type or higher version.

4. Invalid parameter modification

If the modification of P46 does not take effect, it needs to be powered on in a loop or reset using P56=2.

When writing parameters, if the driver is running and the parameters are not allowed to be modified online, error code 10 will be returned (the driver is running when attempting to write parameters). Need to stop driving first.