RKC FB900 TEMPERATURE CONTROLLER
Distributor RKC
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PT SASUMA MITRA PERKASA
BUSINESS PARK BLOK BB NO.5
KOMPLEK CIPINANG INDAH JAKARTA 13430
No.Telp/WA : +62 813-8668-1970
Digital Controller FB100/400/900 (hereafter, called controller) interfaces with the host computer via
Modbus or RKC communication protocols. In addition, there is the Modbus data mapping function
which enables high-speed communication by collecting only the data to be communicated at all times
in the specified address area.
The FB100 is capable of communication when optional function E, F, G, H, or J is added.
One-point communication is possible with optional functions E, F, H, and J, and two-point
communication is possible with optional function G.
Communication port
[FB100]
There are a maximum of two communication ports: Communication 1 and Communication 2.
When one-point communication is used, Communication 1 is used for either Host communication
or Intercontroller communication.
When two-point communication is used, Communication 2 can be used. Communication 2 is a
port for Intercontroller communication, but can be also used for Host communication.
[FB400/900]
There are two communication ports: Communication 1 and Communication 2.
Communication 1 is used for Host communication.
Communication 2 is used for Intercontroller communication, but can be also used for Host
communication.
When Communication 2 is used for Host communication, refer to the Change the
protocol of the Communication 2 port (P. 15).
Communication interface
Communication 1 interface: RS-422A, RS-485, RS-232C (The interface of FB100 is only RS-485.)
Communication 2 interface: RS-485
(When Communication 1 is used for RS-422A, no Communication 2
can be used.)
For reference purposes, the Modbus protocol identifies the host computer as master, the controller as
slave.
Multi-drop connection
Point-to-point connection
RS-232C Host computer Controller
RS-422A or RS-485
Host computer
Controller Controller Controller Controller Controller
Maximum connections: RS-422A: Up to 31 controllers
RS-485: Up to 31 controllers
2 IMR01W04-E6
2. SPECIFICATIONS
RKC communication
Interface: FB100: Based on RS-485, EIA standard
(Communication 1 and communication 2)
FB400/900:
Communication 1: Based on RS-422A, EIA standard
Based on RS-485, EIA standard
Based on RS-232C, EIA standard
Communication 2: Based on RS-485, EIA standard
Specify the Communication 1 and Communication 2 separately
when ordering. However, when Communication 1
is used for RS-422A, no Communication 2 can be used.
Connection method: RS-422A: 4-wire system, half-duplex multi-drop connection
RS-485: 2-wire system, half-duplex multi-drop connection
RS-232C: 3-wire system, point-to-point connection
Synchronous method: Start/Stop synchronous type
Communication speed: 2400 bps, 4800 bps, 9600 bps, 19200 bps, 38400 bps
Data bit configuration: Start bit: 1
Data bit: 7 or 8
Parity bit: Without, Odd or Even
Stop bit: 1 or 2
Protocol: ANSI X3.28-1976 subcategories 2.5 and A4
RKC communication protocol
Polling/Selecting type
Error control: Vertical parity (With parity bit selected)
Horizontal parity (BCC check)
Communication code: ASCII 7-bit code
Termination resistor: Externally terminal connected (RS-485)
Xon/Xoff control: None
Maximum connections: RS-422A: Up to 31 controllers
RS-485: Up to 31 controllers
RS-232C: 1 controller
Signal logic: RS-422A, RS-485
Signal voltage Logic
V (A) V (B) 2 V 0 (SPACE)
V (A) V (B) 2 V 1 (MARK)
Voltage between V (A) and V (B) is the voltage of (A) terminal
for the (B) terminal.
RS-232C
Signal voltage Logic
3 V or more 0 (SPACE)
3 V or less 1 (MARK)
2. SPECIFICATIONS
IMR01W04-E6 3
Modbus
Interface: FB100: Based on RS-485, EIA standard
(Communication 1 and Communication 2)
FB400/900:
Communication 1: Based on RS-422A, EIA standard
Based on RS-485, EIA standard
Based on RS-232C, EIA standard
Communication 2: Based on RS-485, EIA standard
Specify the Communication 1 and Communication 2
separately when ordering. However, when Communication 1
is used for RS-422A, no Communication 2 can be used.
Connection method: RS-422A: 4-wire system, half-duplex multi-drop connection
RS-485: 2-wire system, half-duplex multi-drop connection
RS-232C: 3-wire system, point-to-point connection
Synchronous method: Start/Stop synchronous type
Communication speed: 2400 bps, 4800 bps, 9600 bps, 19200 bps, 38400 bps
Data bit configuration: Start bit: 1
Data bit: 8
Parity bit: Without, Odd or Even
Stop bit: 1 or 2
Protocol: Modbus
Signal transmission mode: Remote Terminal Unit (RTU) mode
Function code: 03H (Read holding registers)
06H (Preset single register)
08H (Diagnostics: loopback test)
10H (Preset multiple registers)
Error check method: CRC-16
Error code: 1: Function code error
2: When the mismatched address is specified.
3: When the specified number of data items in the query message
exceeds the maximum number of data items available
4: Self-diagnostic error response
Termination resistor: Externally terminal connected (RS-485)
Maximum connections: RS-422A: Up to 31 controllers
RS-485: Up to 31 controllers
RS-232C: 1 controller
2. SPECIFICATIONS
4 IMR01W04-E6
Signal logic: RS-422A, RS-485
Signal voltage Logic
V (A) V (B) 2 V 0 (SPACE)
V (A) V (B) 2 V 1 (MARK)
Voltage between V (A) and V (B) is the voltage of (A) terminal for
the (B) terminal.
RS-232C
Signal voltage Logic
3 V or more 0 (SPACE)
3 V or less 1 (MARK)
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