Watlow Series 942 Data Communications - Manual (Page 2)

2 WATLOW Series 942 How to Use Data Communications
Contents
Page Item
3 Data Communications and the Series 942
3 Hardware Interfaces Protocols
3 Communications Wiring
4 RS-422A Interface Pinouts
5 RS-423A Interface Pinouts
(RS-232C Compatible)
6 EIA-485 Interface Pinouts
7 Setting Hardware Protocol Switches
7 Network Connections
8 Connecting the Control and Computer
8 Communications Parameters
8 ASCII and Series 942 Information
8 Communication Software
10 Series 942 General Message Syntax
10 Message Syntax
10 Data Rules
11 Command List
11 Example Format
12 XON/XOFF Protocol for RS-423A
12 Start and Stop Communicating with the
Series 942 and XON/XOFF
13 XON/XOFF "=" Command Example
14 XON/XOFF "?" Command Example
15 ANSI X3.28 Protocol for RS-422 & EIA-485
15 Device Address
15 Starting Communications in ANSI X3.28
16 Stopping Communications in ANSI X3.28
16 ANSI X3.28 "=" Command Example
17 ANSI X3.28 "?" Command Example
18 "?" Command
19 "=" Command
21 "? MDL" Command
21 "? MTR" Command
22 "? STP" Command
22 "= HOLD" Command
22 "= RESU" Command
23 "= STRT" Command
23 "= STP" Command
23 Data Logging
25 NAKs and Error Codes
25 User Responsibility
26 Index
Figures Item
1 RS-422 Interface Wiring
2 RS-423 Interface Wiring
3 EIA-485 Interface Wiring
4 RS-422/RS-423 Switch Selection
5 General Message Syntax Example
6 XON/XOFF "=" Command Example
7 XON/XOFF "?" Command Example
8 ANSI X3.28 "=" Command Example
9 ANSI X3.28 "?" Command Example
10 Data Logging Interface Wiring
11 Data Logging Printout Example
Tables Item
1 ASCII Character Set
2 ASCII Control Characters (Partial Set)
3 Address to ASCII Conversion
4 "?" Command Data and Responses,
5 "=" Command and "?" Command Data
6 "? MTR" Command Response Data
7 "? STP" Command Response Data
8 "= STP" Command Data
9 Printer Troubleshooting