Toshiba T300MVi MEDIUM VOLTAGE, Instruction Manual

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INTERFACE (cont’d)
Digital Output
There are 6 programmable digital outputs (DO0-5). DO5 is used internally for control of the input
contactor and should not be changed. The other 5 outputs are available for optional control or indication
functions. These relays can be programmed to any bit in any word in the drive. The most commonly used
bits can be found in the SSEQ_OUT1 and SSEQ_OUT2 words. The word assignment is made via DO0_AS
- DO4_AS parameters. The bit number is set via DO0_BN – DO4BN.
Analog Input
The drive has two general-purpose analog input channels (AIN1, AIN2). They are fixed at
±
10VDC. The analog signals are converted to digital values through a 12-bit A/D converter. A
±
10 Vdc input
is converted to counts by software and is stored in the target data register. Since this signal is directly
connected to the control circuit, it is recommended that an isolation transducer be used. The data register,
the gain and the offset are set with the following parameters:
AIN#_AS
Target register – set by symbol name
AIN#_GS Gain setting – defines the number of counts for 10V input
AIN#_OS Offset setting – offsets the input
The "#" of each parameter name denotes the AD channel number. The following figure shows the input
circuit:
Analog Input Circuit
Data storage
destination
AIN1_AS
Gain
AIN1_GS
AIN1
TB2-1
TB2-2
TB1-31
Offset
AIN1_OS
AIN2
Gain
AIN2_GS
Data storage
destination
AIN2_AS
Offset
AIN2_OS
TB1-30