Individual Functions
6-71
îš„Related Parameters
MEMOBUS communications can perform the following operations regardless of the settings in b1-01 and
b1-02.
• Monitoring operation status of the inverter
• Setting and reading parameters
• Resetting faults
• Inputting digital input commands. (an OR operation is performed between the commands from MEMO-
BUS communication and the signals input from multi-function digital input terminals S3 to S7.)
îš„Setting RUN Command and Frequency Reference by MEMOBUS
If the RUN command or the frequency reference should be input directly by MEMOBUS communication
parameter b1-01 respectively b1-02 have to be set to 3 (Serial communication)
îš„MEMOBUS Communication settings
• Parameter H5-02 selects the communication speed. Following speeds are possible: 1200 bps (setting 0),
2400 bps (setting 1), 4800 bps (setting 2), 9600 bps (setting 3, default) and 19200 bps (setting 4).
• Parameter H5-03 selects the used parity between no parity (setting 0, default), even parity (setting 1) and
odd parity (setting 2).
• Parameter H5-04 selects the Inverter’s behaviour when a communication error (CE) has occurred and
H5-05 is set 1. Following settings are possible:
0: Deceleration to stop using deceleration time c1-02, CE fault.
1: Coast to stop, CE fault.
2: Emergency stop using the emergency stop time c1-09, CE fault.
3: Continue operation, CE alarm is displayed.
Parameter H5-05 selects whether communication error (CE) is detected or not. The default setting is 1, a
time out from the master is detected after not receiving any message for the time set in H5-09.
• Parameter H5-06 specifies the delay time the Inverter waits until it sends the response on the received mes-
sage from the master.
• Parameter H5-07 configures whether the Inverter will implement RTS (Request To Send) messaging all
the time (H5-07=0) or only when sending (H5-07=1). It is recommended to set H5-07 to 0 when using
RS485 and to 1 when using RS422.
Parameter
Number
Name
Setting
Range
Factory
Setting
Change
during
Operation
Access
Level
b1-01 Reference source selection 0 to 3 1 No Q
b1-02 RUN command Source Selection 0 to 3 1 No Q
H5-01 Station address
0 to 20
*1
*1. Set H5-01 to 0 to disable Inverter responses to MEMOBUS communication
1F No A
H5-02 Baud rate selection 0 to 4 3 No A
H5-03 Communications parity selection 0 to 2 0 No A
H5-04 Communications error detection selection 0 to 3 3 No A
H5-05 Communications error detection selection 0 or 1 1 No A
H5-06 Send wait time
5 to 65
msec
5 msec No A
H5-07 RTS control ON/OFF 0 or 1 1 No A
H5-08 Communication Selection 0 or 1 0 No A
H5-09 CE detection time
0.0 to
10.0 sec.
2.0 sec. No A
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