2-7
Part 2: Connections and Interface
MDrivePlus Motion Control #1
(DN=A)
Mating
Connector*
RX -
RX +
TX -
TX +
CGND
MDrivePlus Motion Control #2
(DN=B)
Mating
Connector*
RX -
RX +
TX -
TX +
CGND
* Mating Connector
Samtec
P/N TCSD-05-01-N
Note:
120
Ω
Termination Resistors in series with 0.1µf
ceramic capacitors are recommended at both ends
of the Data Lines when cable length exceeds 15 feet.
Ribbon Cable
AMP 10WDY00005P
RS-232 to RS-422
Converter
TX
RX
CGND
HOST
RX+
TX-
RX-
RX+
CGND
R
TERMINATOR
C
TERMINATOR
100
Ω
100
Ω
Figure 2.2.3: RS-485 Interface, Multiple MDrivePlus Motion Control System
Data Cable lengths greater than 15 feet (4.5 meters) are susceptible to signal reflection and/or noise. IMS recommends
120
Ω
termination resistors in series with 0.1µf capacitors at both ends of the Data Cables. An example of resistor place-
ment is shown in Figure 2.2.3 above. For systems with Data Cables 15 feet (4.5 meters) or less, the termination resistors
are generally not required.
MDrivePlus Motion Control Communication Format
The following communication formats are used by the MDrive34Plus Motion Control.
{}
The contents between the {} symbols are transmitted.
{0D}
Hex equivalent for a CR (Carriage Return).
{0A}
Hex equivalent for a LF (Line Feed).
{DN}
Represents the Device Name being sent.
{CS}
Check Sum; {ACK} 06 Hex; {NAK} 15 Hex
EM = Echo Mode; PY = PartY Mode; CK= ChecK sum
The word {command} represents the immediate command sent to the MDI.
Command Execution Time (CET) is the time the MDI takes to execute a command. This varies from command to com-
mand and usually is in the 1-5 millisecond range.
MDrivePlus Motion Control (MDI) Response to Echo Mode
Dependent on how the Echo Mode (EM) is set in conjunction with Party Mode (PY) and Check Sum (CK), the MDI
will respond differently. The following tables illustrate the various responses based on how the EM, PY and CK param-
eters are set.
Summary of Contents for MDrive 34 Plus Series
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