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9.3. RS-232C Communication
9.3.1. Specification of Communication
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Setting of various parameters, trial running, and adjustment are enabled by issuing commands to the
Driver Units through serial communication (i.e., communication through the RS-232C interface).
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The Driver Unit has CN1 as the input/output ports for RS-232C communication.
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When the Handy Terminal (FHT11) is not in use, set the MM parameter to 0.
MM1 : Standard setting (for the Handy Terminal)
MM0 : For connection with a personal computer
Table 9-13: RS-232C communication specification
Item
Specification
Transmission
Asynchronous, full duplex
Communication speed
9600 b.p.s.
Word length
8 bit
Stop bit
2 bit
Parity
No
Character code
ASCII code
Communication procedure
•
X–On/Off Protocol
: No
•
RTS/CTS Control
: Yes
9.3.2. Communication Procedure
9.3.2.1. When Power is Turned on
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If a terminal (such as NSK Handy Terminal FHT11) is connected to CN1 and the Driver Unit
power is turned on, the message shown below is displayed.
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The contents (and the number of characters) of this message may differ with the Driver Unit
setting and system versions.
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When the Driver Units are initialized, a colon ( : ) is displayed and the system waits for a command
to be entered. (The colon ( : ) is called a prompt.)
Figure 9-33: Power-on message
NSK MEGATORQUE
MS1A50_xxxx
Exxxxxxxxxx
:_
Slightly differs with system configurations.
Indicates that internal initialization is completed
and a command may be accepted.
Caution : Connect and disconnect the communication cable (CN1) when the power to
Driver Unit is off. Otherwise it may lead to an alarm of communication error
and system breakdown.
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