Rockwell Automation 1398-PDM-xxx IQ Master Version 3.2.4 for IA-2000 and IQ-5000 Positioning Drive Modules, IQ-55 - Manual (Page 313)

Introduction • Addressing 291
Publication 1398-PM601A-EN-P — October 2000
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Series Controllers” in the appropriate ULTRA Plus or IQ-Series Installation Manual (1398-5.1, Part
Number 0013-1027-004 or Part Number 0013-1022-004) for details on setting an address and wiring
the ULTRA Plus or IQ. Refer to Part 2 • IQ Master Environment, Communications menu, Axis Select
for setting IQ Master to communicate with an ULTRA Plus or IQ set to an address other than zero.
A two character sequence is used to select an ULTRA Plus or IQ by address. A Control-B character
(ASCII STX, Hexadecimal 02) followed by the address number (01 through 3F Hex) will select an indi-
vidual ULTRA Plus or IQ. All ULTRA Plus or IQ units with addresses other than the one selected will
not transmit and will ignore all serial commands other than the address select command.
Example:An ULTRA Plus or IQ is configured to address 3. The two character sequence, 02 Hex and 03
Hex, will select the ULTRA Plus or IQ.
Even if an ULTRA Plus or IQ is configured with a non zero address, the address zero may be used to
transmit identical commands to multiple ULTRA Plus or IQs. Address zero may be selected by trans-
mitting the sequence 02 Hex, 00 Hex. (00 Hex may be sent on most PC keyboards by pressing Control-
@.) When address zero is selected, and SW1 is set to an address other than zero, all ULTRA Plus or IQ
units will respond to commands, but no ULTRA Plus or IQ will transmit data back to the host or echo
the incoming command. This mode is useful to tell all ULTRA Plus or IQ units to simultaneously per-
form a similar function. For example, sending “RUN 1” to all ULTRA Plus or IQ units, will cause all
ULTRA Plus or IQs to run their own program number 1.
On power up, any ULTRA Plus or IQ with SW1 set to an address other than zero will neither transmit
nor act on an incoming command other than an address select command. In other words, no ULTRA
Plus or IQ is selected. Therefore, to communicate to an ULTRA Plus or IQ with SW1 set to an address
other than zero after power-up, the host must select either address zero or the address set on SW1.
If two or more ULTRA Plus or IQ units are set to the same address on a serial link, scrambled commu-
nications will result. Exercise caution when setting communication addresses to avoid duplicate
addresses.
Note: A drive configured to address 2 requires the sequence, 02 Hex followed by another 02 Hex
character. Even though the same character is used, each has a different purpose. The first 02 Hex
character is the address command and the second is the actual address