Rockwell Automation CompactLogix 5380/5480 Complete Guide

4.2 Conformal Coating

The controller with K at the end of the model (such as 5069-L310ERMS2K, 5069-L350ERMS3K) has been treated with a three proof coating, which can resist moisture, corrosive gases (such as hydrogen sulfide, chlorine gas), and dust. Suitable for harsh environments such as chemical plants, offshore platforms, and sewage treatment. The standard model does not come with a coating, and if used in these situations, circuit board corrosion and intermittent communication failures may occur within a year.

Fault case: A chemical plant used the standard model 5069-L320ER, but after one year, there were frequent Ethernet port link failures. During disassembly inspection, white corrosion was found on the surface of the PCB. The problem was solved after replacing with a model with K coating.

Communication and I/O Capacity Planning (Essential for Engineers)

5.1 Ethernet Node Count Limit

The number of EtherNet/IP nodes supported by the controller depends on the specific model, and the following are key data (Logix Designer v31 and above):

Maximum number of nodes for the model

5069-L306ER/L306ERM/L306ERS2, etc. 16

5069-L310ER/L310ERM/L310ERS2, etc. 24

5069-L320ER/L320ERM/L320ERP/L320ERS2, etc. 40

5069-L330ER/L330ERM/L330ERS2, etc. 60

5069-L340ER/L340ERM/L340ERP/L340ERS2, etc. 90

5069-L350ERM/L350ERS2, etc. 120

5069-L380ERM/L380ERS2, etc. 150

5069-L3100ERM/L3100ERS2, etc. 180

5069-L430ERMW (5480) 60

5069-L450ERMW (5480) 120

5069-L4100ERMW (5480) 180

5069-L4200ERMW (5480) 250

Important: All devices added to the I/O configuration tree are counted as nodes, including remote adapters (such as 5069-AENTR), embedded Ethernet devices (frequency converters, I/O modules), another controller connected to the producer/consumer, and third-party devices. If HMI is directly placed in the I/O configuration tree, it will also be accounted for.

Troubleshooting: When the number of project nodes exceeds the controller limit, Logix Designer will prompt "Too many I/O connections". Solution: Re evaluate the network architecture, use switch layering to reduce the number of devices directly connected to the controller, or upgrade to a controller with a higher number of nodes.

5.2 Limit on the number of local I/O modules

The CompactLogix 5380 system locally supports Compact 5000 I/O modules. The maximum quantity varies by model:

Low end models (L306/L310 series): up to 8 local I/O modules.

Mid end models (L320 series): up to 16.

High end models (L330 and above): up to 31 (but note that L330 is limited to 16 in Logix Designer v29 and only supports 31 in v30 and above).

GuardLogix SIL3 model: Local support for mixed use of standard I/O and safety I/O, with the same quantity as above.

Important: If installing Compact 5000 I/O modules next to the controller, the entire system must be installed horizontally. If Compact 5000 I/O is not installed, CompactLogix 5480 can be installed in any direction.

5.3 Remote I/O Support

Through the EtherNet/IP network, the controller can connect to various remote I/O series:

Rack mounted: 1746 SLC, 1756 ControlLogix, 1769 Compact I/O, Compact 5000

Cabinet type: 1734 POINT I/O, 1794 FLEX I/O, FLEX 5000

On the machine: 1732 ArmorBlock, 1738 ArmorPOINT

Secure remote I/O only supports Compact 5000 Secure I/O, 1756 ControlLogix Secure I/O, 1734 POINT Guard I/O, FLEX 5000 Secure I/O, and 1732 ArmorBlock Guard I/O.

Integrated motion control selection

For applications that require servo control, it is necessary to choose a controller with M included in the model (such as 5069-L320ERM, 5069-L350ERMS3). The motion control capacity is as follows:

The maximum number of axes for the controller, including the upper limit of the number of driving axes for the position ring

5069-L306ERM 2 2

5069-L310ERM 4 4

5069-L320ERM 6 6

5069-L330ERM 8 8

5069-L340ERM 16 16

5069-L350ERM 32 24

5069-L380ERM 60 28

5069-L3100ERM 256 32

5069-L430ERMW (5480) 64 16

5069-L450ERMW (5480) 128 24

5069-L4100ERMW (5480) 256 32

5069-L4200ERMW (5480) 512 150

Selection suggestion: If the project requires more than 32 axes, the CompactLogix 5480 series must be selected. At the same time, it is important to note that the motion control cycle time should match the EtherNet/IP network load, and it is recommended to use independent network segments or DLR ring networks to ensure real-time performance.

Non volatile storage and SD card operation

7.1 Supported SD Cards

The controller supports the following Secure Digital cards:

1784-SD1（1 GB）

1784-SD2（2 GB）， Comes with the controller

1784-SDHC8（8 GB）

1784-SDHC32（32 GB）

9509-CMSDCD4 (4 GB, used to enable license based source protection and execution protection)

Environmental specifications: Operating temperature -40 ° C to+85 ° C, storage -65 ° C to+150 ° C, anti vibration 15g peak.

7.2 Common SD Card Malfunctions

Fault 1: The controller does not load the program after power on, displaying "Load from SD card failed".

Troubleshooting: Check if the SD card is formatted as FAT32; Confirm that the 'Load on Power Up' option is correctly configured in Logix Designer; Try unplugging the SD card again (power off operation). If the card is damaged, use a new card and re store the program.