Table of Contents
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7. Operation .................................................................. 23
8. Troubleshooting and Maintenance ......................... 25
Appendices
Figures
Tables
CRBasic Examples
6.3.2.2
Example using RS-485 Mode .......................................... 22
7.1
Configuring Handshaking and Receive-Only Modes ........................ 23
7.1.1
Using RTS/CTS and Automatic Handshaking ........................... 23
7.1.2
RS-485 Half-Duplex Mode ........................................................ 23
7.1.3
Using the RS-232 Link in Receive-Only Mode ......................... 24
7.2
Power Conservation .......................................................................... 24
7.3
Schematic .......................................................................................... 24
8.1
Troubleshooting ................................................................................ 25
8.2
Maintenance ...................................................................................... 26
8.2.1
Upgrading the Operating System ............................................... 27
8.2.2
Operating System Signature Errors ............................................ 27
8.2.3
Checking the Operating System Version and Signature ............ 28
A.1
The Input Pin (CTS/Pin 11) ............................................................. A-1
A.2
The Output Pin (RTS/Pin 8) ............................................................ A-2
SDM-SIO1 ............................................................. B-1
1-1.
SDM-SIO1A Serial Input/Output Module .......................................... 1
7-1.
RS-485 Internal Circuit Diagram ...................................................... 25
6-1.
SDM Address Settings ........................................................................ 9
6-2.
SDM-SIO1A Terminal Labels and Functions ................................... 10
6-3.
SDM-SIO1A Functional Description of the Connections ................. 10
6-4.
Communications Port Parameters RS-232 ........................................ 17
6-5.
Communications Port Parameters RS-485 Full Duplex .................... 17
6-6.
Communications Port Parameters RS-485 Half Duplex ................... 18
6-7.
B-1.
Pin Cross Connection Table for SDM-SIO1 to SDM-SIO1A ......... B-1
6-1.
RS-232 Mode Example ..................................................................... 21
6-2.
RS-485 Mode Example ..................................................................... 22
8-1.
Checking the Operating System Version and Signature .................... 28
A-1.
Detecting the State of the Input Line ............................................... A-1
ii
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