MKS 356 Micro-Ion Plus Series, Инструкция по эксплуатации, Страница: 40 / 76

Chapter 3
40
Micro-Ion
®
Module Instruction Manual - 356007-GP
3.12 RS-485 Operation and
Commands
This following sections of the Operation chapter provide detailed
information to use the Series 356 Micro-Ion Plus Module with the RS-485
digital interface. Topics covered are:
RS-485 Physical Layer (Section 3.13)
RS-485 Initial Setup (Section 3.14)
RS-485 Data Timing and Response (Section 3.15)
RS-485 Command Structure (Section 3.16)
RS-485 Command Sets (Section 3.17)
RS-485 Commands (Section 3.18 and Section 3.19)
3.13 RS-485 Physical Layer
Table 3-8 RS-485 Physical Layer Specifications
Function Description
Arrangement 2-wire half duplex
Address range 0 to 63
Default address 01
Method for setting module address • Use address switches to set value of 0 to 15 for address
• Send SA command to set value of 10, 20, or 30 for address offset
Maximum cable length • 4000 feet (1610 meters)
• A common ground wire should connect all network devices for
long cable runs
Maximum number of devices in network 31 devices
Default baud rate 19200 baud (19.2 kbaud)
Data bits 8 data bits
Stop bits and parity 1 stop bit, no parity