Yaskawa Varispeed 626M5 - Manual (Page 143)

8.7 Stop Position Reference Signals
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8.7 Stop Position Reference Signals
This section explains the stop position reference signal connections, status displays, and signal details.
8.7.1 Stop Position Reference Signal Connections
Connections for the stop position reference signal differ for stand-alone drive use and NC system use, as
shown below.
J
Stand-alone Drives (M5A)
Connect the stop position reference signal to connector 1CN on the Inverter. Any of the following inputs
can be used for the signal circuit common: 0 V common, 24 V common, or external common. For details,
refer to 3.4.4 Sequence Input Signal Circuits.
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NC Systems (M5N)
The Inverter performs serial communications for the stop position reference signal using NC Unit and YE-
NET1200 communications. For the NC Unit stop position reference address, refer to the NC Unit user’s
manual.
8.7.2 Stop Position Reference Signal Status Display
The ON/OFF status of the stop position reference signal can be checked using control signal U1-19. As
shown in the following diagram, the display details are displayed using the LED display on the Digital
Operator. (For operation details, refer to Chapter 5 Operating the Digital Operator.)
D1
D6
D11
D2
D7
D12
D3 D4
D9
D5
D10 D8
UI-19
12-bit digital reference
signal status
Note: When the input signal is ON, the indicator is lit.
Fig 8.9 Stop Position Reference Signal Status Display.
8.7.3 Details of the Stop Position Reference Signal
This section explains the stop position reference signals.
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D1 to D12 (Stop Position Reference Signals)
Bit 7
C1−36
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.
Operation is performed when pins 19 to 30 on connector 1CN are turned ON. Pins 19 to 30 correspond
to signals D1 to D12.
D
Signals D1 to D12 are stop position reference signals when performing user-set position stop control
using a motor encoder or load shaft encoder.
D
Stop position references are sent externally, taking the load shaft origin to be 0.
D
The position reference can be selected using 12-bit binary or 3-digit BCD.
Absolute Binary Data 12 bits 0_ to 359.9_
(000 to FFF Hex)
BCD Sign: 1 bit
Data 3 digits (11 bits)
−θ to θ
(−799 to 799 decimal)
Incremental Binary Sign: 1 bit
Data: 11 digits
−2,047 to 2,047 pulses
(−000 to 7FF Hex)
BCD Sign: 1 bit
Data: 3 digits (11 bits)
−θ to θ
(−799 to 799 decimal)
D
When the sign bit is ON, the sign is negative, and when the sign bit is OFF, the sign is positive.
D θ is determined by adding the 3-digit BCD data and the BCD stop position reference resolution C2-12
(P
BCD
) of the control constant. The following equation must be satisfied: θ < 360_
D
The relationship between the reference signals and the number of pulses is shown in the following
table.
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