YASKAWA E7LVD002, Technical Manual, Page: 257 / 306

Communications D - 5
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Related Parameters
Modbus communication can perform the following operations regardless of the settings in b1-01 and b1-02:
1.
Monitoring operation status of the Drive
2. Setting and reading Drive parameters
3. Resetting faults
4. Input multi-function commands
Table D.2 Serial Communication Related Parameters
Parameter
No.
Parameter Name
Digital Operator Display
Description
Setting
Range
Factory
Setting
Chapter
Ref #
Menu
Location
b1-01
Frequency Reference
Selection
Reference Source
Selects the speed command (frequency reference)
input source.
0: Operator - Digital preset speed d1-01
1: Terminals - Analog Input Terminal A1
(or Terminal A2 see parameter H3-13)
2: Serial Com - RS-485 terminals R+, R-, S+ and S-
3: Option PCB - Option board connected at 2CN
0 to 3 1
Quick
Setting
b1-02
Run Command Selection
Run Source
Selects the run command input source.
0: Operator - "Hand" and "Off" keys on digital oper-
ator
1: Terminal - Contact Closure on Terminal S1
2: Serial Com - RS-485 terminals R+, R-, S+ and S-
3: Option PCB - Option board connected at 2CN
0 to 3 1
Quick
Setting
H5-01
Drive Node Address
Serial Com Adr
Selects Drive station node number (address) for
terminals R+, R-, S+, S-.*
* Set H5-01 to 0 to disable Drive responses to
Modbus communications.
0 to FF
(H5-08
dependent)
1F Programming
H5-02
Communication Speed Selection
Serial Baud Rate
Selects the baud rate for terminals R+, R-, S+
and S-*.
0: 1200 Baud
1: 2400 Baud
2: 4800 Baud
3: 9600 Baud
4: 19200 Baud
0 to 4 3 Programming
H5-03
Communication Parity Selection
Serial Com Sel
Selects the communication parity for terminals R+,
R-, S+ and S-.*
0: No Parity
1: Even Parity
2: Odd Parity
0 to 2 0 Programming
H5-04
Stopping Method after
Communication Error
Serial Fault Sel
Selects the stopping method when a communication
error is detected.
0: Ramp to Stop
1: Coast to Stop
2: Fast-Stop
3: Alarm Only
4: Run at D1-04
0 to 3 3 Programming
H5-05
Communication Error Detection
Selection
Serial Flt Dtct
Enables or disables the communications timout
detection function.
0: Disabled - A communications loss will NOT
cause a communications fault.
1: Enabled - If communications is lost for more than
the time specified in parameter H5-09, a communi-
cations fault will occur.
0 or 1 1 Programming
H5-06
Drive Transmit Wait Time
Transmit WaitTIM Sets the time from when the Drive receives data to
when the Drive sends data.
5 to 65 5ms Programming
H5-07
RTS Control Selection
RTS Control Sel
Enables or disables request to send (RTS) control:
0: Disabled
1: Enabled
0 or 1 1 Programming
H5-08
Communication Protocol
Selection
Protocol Select
Selects the communication protocol.
0: Modbus
1: N2 (Metasys)
2: P1 (APOGEE)
0 to 2 0 Programming
H5-09
Communication Error
Detection Time
CE Detect Time Determines how long communications must be lost
before a fault is annunciated. Works in conjunction
with parameters H5-05 and H5-04.
0.0 to 10.0 2.0sec Programming
* After these parameters are changed Drive power must be cycled before the changes will take effect.
IMPORTANT
An OR operation is performed between the multi-function command input from the DDC and the command
input from multi-function digital input terminals S3 to S7.