Chapter 4 Detailed Descriptions of the Fieldbus Network Adapters
GFK-2958E RSTi-EP User Manual 84
Writing of multiple holding registers
Bitwise changing of one holding register
Read/Write Multiple Registers
Reading of multiple input registers and writing of multiple holding
registers simultaneously
†
Function codes 1, 2, 5 and 15 for bit-wise access to registers. For the usage of these codes please note:
In MODBUS protocol bit addressing separated from register addressing has not been specified. Bit and register address
need to be implemented within the access address as follows: dismiss the most significant digit of the register address,
shift the three less significant digits to the left and use the vacant least significant digit for bit addressing. Example:
register access with function code 1 to address 0x80AB would be a read access to register 0x080A bit 11. Therefore the
usage of function codes 1, 2, 5, 15 is limited to the address range of 0x0000 – 0x0FFF.
Supported Modules and Power Supplies
Digital Input, 4 Points, Positive Logic 24VDC, 2,3, or 4 Wire
Digital Input, 8 Points, Positive Logic, 24VDC 2 Wire
Digital Input, 8 Points, Positive Logic, 24VDC 3 Wire
Digital Input, 16 Points, Positive Logic, 24VDC, 1 Wire
Digital Input, 4 Points, Positive Logic 24VDC, 2,3, or 4 Wire, Time stamp
Digital Input, 4 Points 110/230 VAC (65 – 277 VAC), 2 Wire, Isolated
Digital Output, 4 Points, Positive Logic 24VDC, 0.5A, 2,3, or 4 Wire
Digital Output, 4 Points, Positive Logic 24VDC, 2.0A, 2,3, or 4 Wire
Digital Output, 4 Points, Positive/Negative Logic 24VDC, 2.0A, 2,3, or 4 Wire
Digital Output, 8 Points, Positive Logic, 24VDC, 0.5A, 2 Wire
Digital Output, 16 Points, Positive Logic, 24VDC, 0.5A, 1 Wire
Digital Relay Output Modules
Digital Relay Output, 4 Points, Positive Logic, 24 - 220 VDC/VAC, 6A, 2 Wire
Solid-state Relay Output Module
Analog Input, 4 Channels Voltage/Current 16 Bits 2, 3, or 4 Wire
Analog Input, 4 Channels Voltage/Current 16 Bits with Diagnostics 2, 3, or 4 Wire
Analog Input, 4 Channels Voltage/Current 12 Bits 2, 3, or 4 Wire
Analog Input, 8 Channels Current 16 Bits 2, 3, or 4 Wire
Analog Input, 8 Channels Current 16 Bits 2, 3, or 4 Wire, Channel Diagnostic
Analog Input, 4 Channels RTD 16 Bits with Diagnostics 2, 3, or 4 Wire
Analog Input, 4 Channels TC 16 Bits with Diagnostics 2, 3, or 4 Wire
Analog Output, 4 Channels Voltage/Current 16 Bits 2, 3, or 4 Wire
Analog Output, 4 Channels Voltage/Current 16 Bits with Diagnostics 2, 3, or 4 Wire
1 Channel High Speed Counter, AB 100 kHz 1 DO 24VDC, 0.5A
2 Channel High Speed Counter, AB 100 kHz
2 Channel Frequency Measurement, 100 kHz
1 Channel Serial Communications, 232, 422, 485
1 Channel SSI Encoder, BCD or Gray-Code Format, 5/24 VDC
2 Channels PWM Output, Positive Logic, 24VDC, 0.5 A
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