Omega Engineering CYD201, Руководство оператора

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OMEGA Model CYD201/CYD208 User’s Manual
Remote Operation 4-1
CHAPTER 4
REMOTE OPERATION
4.0 GENERAL
The Model CYD201/CYD208 Digital Thermometer Serial Interface can be
used for both operation and service. This chapter covers the Serial Interface
(Paragraph 4.1) and Serial Interface Commands (Paragraph 4.2).
4.1 SERIAL INTERFACE
The Model CYD201/CYD208 has a serial interface for RS-232C
communications with a host computer. RS-232C is an unbalanced (single
ended), non-terminated line used over short distances (typically 10 feet or
less). The Model CYD201/CYD208 serial interface complies with the
electrical format of the RS-232C Interface Standard. The serial interface
connector is a standard 6 wire RJ-11 modular (telephone) jack.
This section covers Serial Interface Specifications (Table 4-1), Serial
Interface Connections (Paragraph 4.1.1), Serial Interface Hardware
Configuration and Adapters (Figures 4-1 & 4-2), Serial Interface Operation
(Paragraph 4.1.2), and Sample Basic and QuickBasic Programs
(Paragraphs 4.1.3 & 4.1.4 respectively).
Table 4-1. Serial Interface Specifications
Transmission: Three-Wire
Connector:
RJ-11 Modular (Telephone) Socket
Timing Format: Asynchronous
Transmission Mode: Half Duplex
Baud Rate: 300
Bits per Character: 1 Start, 7 Data, 1 Parity, 1 Stop
Parity Type: Odd
Data Interface Levels: Transmits/Receives Using EIA Levels
Terminator: LF (0AH)
4.1.1 Serial Interface Connections
The serial interface connector is a standard 6 wire RJ-11 modular
(telephone) jack. OMEGA Model CYD200-J10 data cables, which maintain
pin 1 polarity, simplify interconnection. OMEGA offers the Model CYD200-D
RJ-11 to DB-25 adapter and Model CYD200-B RJ-11 to DE-9 adapter to
connect to the host computer. See Figure 4-2.