GE VersaMax Nano/Micro Replacement Guide

Ethernet configuration: Using IC200UEM001 allows Micro 20/40/64 to directly connect to the factory Ethernet, supporting SRTP (GE specific protocol) and Modbus TCP servers for easy communication with the upper computer or SCADA.

5.2 External Ethernet Serial Port Server

For CPUs such as Nano or Micro 14 that do not have a second port, the VersaMax SE (IC200SET001) module can be used. It is independently powered (12/24 VDC), providing an Ethernet port and an RS-232/RS-485 serial port to achieve protocol conversion from Ethernet to SNP or Modbus TCP to Modbus RTU. Supports up to 16 serial devices.

5.3 Portable Program Download Device (PPDD)

IC690ACC990 is a field program downloader designed specifically for Micro 23/28. Its characteristics:

No need for a PC, programs and configurations can be uploaded/downloaded through a USB memory stick.

Connect to the CPU via DB-15 RS-485 port (the CPU needs to have port 2).

Support remote transmission of ZIP files: Engineering designers compress binary files and email them to the site, and on-site personnel extract them to a USB drive, insert PPDD, and download them with one click.

Three LED indicator lights (Error red/Status green) provide status feedback: flash indicates CPU type mismatch or file missing, slow flash indicates download in progress, constant light indicates completion or idle.

Usage steps (from original text):

Turn the PPDD selection switch to the USB memory stick, press the button, and store the programs in the CPU to the USB flash drive.

Insert the USB flash drive into the computer, copy the files, and send an email to the remote site.

Remote on-site storage of received files on a USB drive, inserting the USB drive into the PPDD, and turning the switch to the controller.

Press the download button, and PPDD will automatically stop the CPU, download and verify. After completion, the CPU can be run by turning on the key switch or re powering on.

This device greatly simplifies on-site services, especially suitable for equipment upgrades in remote areas.

Common troubleshooting and maintenance

6.1 Fault Symptoms and Countermeasures Table

Possible causes and solutions for the phenomenon

CPU not running (Run LED off) not set to Run mode; Program error; Watch dog timeout check key switch position; Use software to clear faults; Increase scanning time setting

Unable to communicate with programming software due to cable error; Serial port settings do not match; SNP address conflict using IC200CBL500 programming cable; Confirm baud rate (default 19.2k); Check CPU station address

The output point does not operate, and the output fuse is blown; Load short circuit; Check if the electronic protection of the ESCP module is activated when the output point is burnt out (it can be restored when power is turned off and back on); Replace output point

The expansion unit is not working and the expansion cable is loose; Insufficient power supply; Configuration does not enable re plugging of IC200CBL50x cable; Measure the power supply of the expansion unit; Add modules to hardware configuration

Poor shielding of analog reading jump signal line; Common mode voltage is too high; Short sampling time using shielded twisted pair cables and single ended grounding; Increase filtering time constant

Program loss and battery depletion (Micro 23/28), replace IC200ACC403 (standard) or IC200ACC414 (long life); Download the program again

PPDD Error LED is constantly on. No USB flash drive inserted. Insert formatted FAT32 USB flash drive

6.2 Battery replacement and data retention

Micro 23/28/64 uses battery backup for real-time clock and partial RAM. The standard battery IC200ACC403 can maintain data for 5.2 months at 70 ℃ and 32.4 months at 20 ℃. The long-life battery IC200ACC414 maintains a temperature of 70 ℃ for 19 months and 20 ℃ for 121 months. When the battery voltage is low, the "BATT" LED of the CPU will light up. The replacement must be carried out while the CPU is powered on to avoid data loss.

6.3 Complete process for replacing discontinued models

Assuming the original system is damaged using IC200NDR001 (Nano 10 points), the plan is to upgrade to IC200UDR001 (Micro 14 points):

Hardware preparation: Measure the installation space. The size of Micro 14 is 95 × 90 × 76 mm, which is larger than Nano (75 × 80 × 47), and requires rearranging the DIN rail or base plate.

Wiring conversion: Nano's 6-in/4-out terminal block is not compatible with Micro 14's 8-in/6-out terminal block. I/O addresses need to be reassigned according to the original circuit diagram and new terminal blocks need to be crimped.

Program migration: create a new project in Machine Edition, select IC200UDR001, import the logic of the original Nano (export as text or upload through SNP), and then adjust the I/O mapping. Note that the analog input of the original Nano (if any) requires an additional analog expansion module on the Micro 14.

Download test: Connect the IC200CBL500 cable to the CPU, download the program, set to RUN, and test the input and output one by one.

Expansion plan: If the original device requires more I/O, the expansion capability of Micro 14 can be utilized to add UE series modules.