EDR Loopback Test
From EMIT Controls
A loopback test involves setting up the EDR to communicate from its own master to slave port. This tests that both ports are functional.
Test Instructions
- Disconnect any wires in the EDR pins 3-8 and set aside. (We recommend taping over the wires so they don't short to anything)
- With two spare short wires, connect 4-7 and 5-8
- Connect to the EDR wifi (See here for instructions)
- On the "Modbus Master" tab, pick any row that has a register set to something other than "0", and set the ID to "10"
- Within one minute, the value should go to some number and the age should reset to 0s and start counting up (TEST PASS)
- If the test passes, the module comm hardware is verified ok
If test fails
If the test fails, check a couple other settings:
- Under Modbus Master - Network Configuration, verify this config: Baud 9600, data size 8 bit, parity none, stop bits 1, and "use serial" box is checked
- Under Modbus Slave - Network Configuration, the slave ID should be 10
- Under Modbus Slave - Network Configuration, verify this config: Baud 9600, data size 8 bit, parity none, stop bits 1
If the above is verified and the test still fails, the module ports are likely bad.
After the test
- Return wires to original locations
- Set the modbus master row where the ID was changed to "10" back to the original ID (usually "1")
Alternate test (v 1.96 and up)
If the EDR is v1.96 or newer there is a simpler way to run this test
- On the wifi console navigate manually to "172.16.16.1/mfg"
- Open the "Software Version" dropdown and click "Launch test mode"
- The page might show an error, but hit refresh after waiting a few seconds the the EDR test page should show up
- One of the rows shows "RS 485 Master - Slave". This will be red.
- With two spare short wires, connect 4-7 and 5-8. The test should turn to green within 20 seconds
- After the test, return the wires to the original location and cycle power
