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Serial i/o specifications dh-485 specifications – Rockwell Automation 999 IMC S Class Compact Motion Controller (Cat. No. 4100-999-122) User Manual

Page 25

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Introduction

2-9

Publication 999-122 - January 1997

Serial I/O Specifications

DH-485 Specifications

Number of

Serial Channels

2 (Serial Port A and Serial Port B).

Channel Type

Optically isolated RS-232C or RS-422; each channel individually
configurable via internal switch.

Information Code

ASCII (American Standard Code for Information Interchange).

Baud Rate

User-selectable up to 128k Baud (RS-422).
User-selectable up to 115.2k Baud (RS-232C).

Number of

Start Bits

1.

Number of

Stop Bits

1.

Word Length

8 bits total; 7 data bits plus 1 parity bit.

Parity

Space parity transmitted;
Receive parity ignored (may be Mark, Space, Even, or Odd).

Duplex

Full or half (user-selectable).

Data

Synchronization

XON (Control-Q)/XOFF (Control-S).

Front-Panel

Connectors

IBM-PC/AT compatible 9-pin D-type female.

RS-422

Termination

User-selectable 220

resistor via internal switch.

Number of

DH-485 Channels

1; replaces Serial port B when used.

Channel Type

Optically isolated half-duplex RS-485.

Baud Rate

9,600 or 19.2k Baud (user-selectable).

Front-Panel

Connectors

Two RJ-45 jacks (+24V is not provided).

RS-485

Termination

User-selectable 220

resistor via internal switch.

Node Address

User-selectable between 0 and 31 inclusive.

Node Type

Token-passing master.

Accessible Data

Files

1 Binary file (B3) for up to 16,384 bits
1 Integer file (N7) for up to 1,024 16-bit values
1 Floating-point file (F8) for up to 512 32-bit values
1 ASCII string file (A) for up to 2,048 characters
9 user-configurable files; each can be individually configured as any of
the above types or as a BCD file for floating point simulation (required
for certain A-B MMI devices).