Frequently asked questions regarding the the 8171, 8175, 8191 and 8195 products.
- What is the difference between the Keygen (RTU8191/71) and the Modem (RTU8195/75)?
- The Keygen provides the user with an RS232 compatible output, the Modem provides the user with an audio BELL202 output.
- Where do I call my program from on the S5-95U?
- All users programs are called from Program Block 1 (PB1).
- What is the RTU8272-m?
- There is no such model called the RTU8272-m, this was a misprint in Siemens 214RTU release notes, it should have been model RTU8175-m the EIA485 to BELL202 modem.
- When do I enable (ON) and disable (OFF) I/O Service Routine?
- You will need to enable I/O Service Routine when you are communicating to outputs. I/O Service Routine will need to be disabled when you are manipulating outputs directly.
- How is my I/O addressed in modbus?
- For the S5-95U refer to technical note TN95-1. For the S7-214/224 and 216/226 refer to technical note TN214-1.
- I need help with my application program?
- We do not provide application programming support for your PLC. You will need to contact Siemens Support or your local distributor.
- I need to communicate at 1200/2400 baud with my S7-214/224 or 216/226?
- Refer to technical note TN214-2.
- Where do I call my program code from on the S7-214/224 or 216/226?
- Refer to technical note TN214-3.