Using A 12-Bit Digital Speed Reference - YASKAWA VS-626M5 Instruction Manual

Control Signals

4.3 Using a 12-bit Digital Speed Reference

4
This section provides information on using a 12-bit digital speed reference input (for stand-alone drive systems
M5A only).
D1 through D12 (12-bit Digital References 1 through 12)
J
Connector number: 1CN
Pin numbers: 19 through 30
12-bit Digital Reference Signal Function Selection: 1CN-19 to 1CN-30 will be the 12-bit Digital Refer-
ence if bit 07 of the C1-36 selection signals (SEL1) is turned OFF.
C1−36
Bit
Bit 7 is used for internal speed or digital speed settings.
D
It is possible to select 12-bit binary, 2-digit BCD, 3-digit BCD, or internal speed setting for digital
D
speed references. Speed references are factory-set to 12-bit binary.
The setting method can be selected using bits 6 and 7 of selection signal C1-37 (SEL2).
D
C1−37
Bit
Selecting the Speed Setting
D
6CN-5, 19
DAS
OFF
ON
The DAS signal can be switched only when the system is not in operation.
D
If the binary, BCD, or internal speed setting method is selected, the forward or reverse rotation of the
D
motor is selected with the external FWD or REV relay signal.
Internal Speed Setting
Number of speed settings: 8
Speed set value: Input into C1-41 through C1-48 the percentages based on the rated speed set for C1-26
(S100). Set range: 0.00 to 100.00
Control Constant
C1-41
C1-42
C1-43
C1-44
C1-45
C1-46
C1-47
C1-48
If two or more speed selection signals (D1 through D8) are turned ON at the same time, the smaller
D
selection signal number will be enabled. (For example, if D2 and D5 are turned ON simultaneously,
D2 will be enabled.)
If all speed selection signals are OFF, the speed references are treated as 0.
D
No speed reference values in C1-41 through C1-48 can be changed while the system is in operation.
D
7
7 6
C1-37 (SEL2)
Bit 7
---
OFF
OFF
ON
ON
Signal Name
SPD1 Internal speed setting 1
SPD2 Internal speed setting 2
SPD3 Internal speed setting 3
SPD4 Internal speed setting 4
SPD5 Internal speed setting 5
SPD6 Internal speed setting 6
SPD7 Internal speed setting 7
SPD8 Internal speed setting 8
4 -10
Speed Selection
Bit 6
--- Analog speed
OFF 2-digit BCD
ON Binary
OFF 3-digit BCD
ON Internal speed
1CN Input Pin Number
D1 19
D2 20
D3 21
D4 22
D5 23
D6 24
D7 25
D8 26