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Old March 5th, 2019, 06:12 PM   #1
United States

Spidermite is offline
Join Date: Jan 2019
Location: constantine, michigan
Posts: 6
a post

I am trying to use a Micro820 to communicate with a Solo SL4896VRE
temperature controller. The Solo came from Automation Direct.

physical connections between the 2 are:
Micro820 D+ to Solo D+
Micro820 D- to Solo D-

The temperature controller is set up as follows:
C-SL (Modbus Protocol) rtu
C-no (Network Address) 1
bps 9600
LEn 8
Prty Even
Stop 1

The Micro820 controller serial settings are:
Driver ModbusRTU
Baud Rate 9600
Parity Even
Modbus Role Master (but have tryed Auto also)
Protocol Control
Media RS485
Data Bits 8
Stop Bits 1
Responder Timer 200ms
Broadcast Pause 200ms
Inter-Frame 0 Us

The Solo documentation states that the set point is at location 44098
I have included 2 attachments. One is a screen shot of the variables used
and the other is the one rung that is the program.


Once the program is downloaded and I force the trigger, I expect
the Local_Add registers to become populated. All I get are 0's

What am I not doing?
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