Troubleshooting communication - RSI51

RSI51 Installation Manual

Document code
English (United States)
Document type
User guide

If you have problems with data output, make sure that RSI51 is correctly set up.

By default, the data message and the status bit message are transmitted every 10 seconds through 3 different lines:

  • RS‑232
  • RS‑485
  • LAN

This setting can be changed in the QML data logger settings. If the transmit value is set to 0, the system is in poll mode.

Table 1. Serial line parametersThe following table shows the serial lines parameters for RS‑232 and RS‑485 lines.
Parameter Value
Speed 1200
Data bits 7
Stop bits 1
Parity Even

The DSI486 module, which is connected to the MOD1 slot in the QML data logger, provides the RS‑232 and RS‑485 serial connections. To use the RS‑232 mode in channel B of the DSI486 module, make sure that jumper X3 is connected to pins 1 and 2 and jumper X6 is connected to pins 2 and 3.

Figure 1. Jumper locations for DSI486
Pin 1
Pin 2
Pin 3

The DSE101 module, which is connected to the MOD2 slot in the data logger, provides the LAN connection. The QML data logger must have the following default address details:

  • IP address:
  • Subnet mask:
  • Gateway IP address:
  • TCP/IP port: 50000

You can change these values in the QML data logger settings.