RKC INSTRUMENT Z-TIO Host Communication Quick Instruction Manual
Module Type Controller SRZ
IMS01T02-E3
Thank you for purchasing this RKC product. In order to achieve maximum performance and
ensure proper operation of your new instrument, carefully read all the instructions in this
manual. Please place this manual in a convenient location for easy reference.
This manual describes the host communication, module address setting of the Z-TIO
module. For the address setting of any other module, refer to the Instruction Manual for the
respective module. For detailed handling procedures and various function settings, please
refer to separate SRZ Instruction Manual (IMS01T04 -E ).
The above manuals can be downloaded from our website:
URL: http://www.rkcinst.com/english/manual_load.htm
1. COMMUNICATION SETTING
Set communication setting before mounting and wiring of the Z-TIO.
Do not separate the module mainframe from the base with the power turned on. If so,
instrument failure may result.
1.1 Module Address Setting
Set an address for the module using a small blade screwdriver.
Address setting switch
Setting range:
0 to F [0 to 15: Decimal]
Factory set value: 0
• For Modbus, the value obtained by adding “1” to the set address
corresponds to the address used for the actual program.
• To avoid problems or malfunction, do not duplicate an address on the
same communication line.
1.2 Protocol Selections and Communication Speed Setting
Use the DIP switch on the right side of module to select communication speed, data bit
configuration and protocol. The data changes become valid when the power is turned on
again or when changed to RUN/STOP.
DIP switch
Module
mainframe
Right side view
ON
OFF
1 23
45
67
8
ON
(The above figure is for the terminal type. However, the switch positions are the same for the connector type.)
1 2
Communication
speed
OFF OFF
4800
bps
ON OFF
9600
bps
OFF ON
19200
bps
ON ON
38400
bps
Factory set value: 19200 bps
3
4
5
Data bit configuration
OFF
OFF
OFF
Data 7-bit, without parity, Stop 1-bit
*
ON
OFF
OFF
Don't set this one
OFF
ON
OFF
Data 7-bit, Even parity, Stop 1-bit
*
ON
ON
OFF
Data 7-bit, Odd parity, Stop 1-bit
*
OFF
OFF
ON
Data 8-bit, without parity, Stop 1-bit
ON
OFF
ON
Don't set this one
OFF
ON
ON
Data 8-bit, Even parity, Stop 1-bit
ON
ON
ON
Data 8-bit, Odd parity, Stop 1-bit
* When the Modbus communication protocol is selected, this setting becomes invalid.
Factory set value: Data 8-bit, without parity, Stop 1-bit
6 Protocol
OFF RKC
communication
ON Modbus
Factory set value: RKC communication
• Switch No. 7 and 8 must be always OFF. Do not set to ON.
• When two or more modules are connected on the same communication
line, the DIP switch settings of all modules must be the same.
2. CONNECTION TO HOST COMPUTER
Connect a termination resistor between the communication terminals (No.3
and No. 4) of the module at the end of the communication line from the host
computer.
The cable must be provided by the customer.
The Z-TIO has RS-485 communication terminals for RKC communication or Modbus/RTU
communication protocol. Communication terminals are on the base side.
Connection to the RS-485 port of the host computer (master)
Host computer (Master)
RS-485
Pair wire
Shielded twisted
pair wire
Module type controller SRZ
R
SG
T/R (B)
T/R (A)
Connected by
the internal
communication line
Z-TIO module
(Slave)
SG 5
T/R (A) 3
4
T/R (B)
Up to 16 Z-TIO modules can be connected.
The maximum number of SRZ modules (including other function modules) on the same communication line is 31.
R: Termination resistor (Example: 120
Ω 1/2 W)
SG 5
T/R (A) 3
4
T/R (B)
R
(
−)
(
+)
(
−)
(
+)
(
−)
(
+)
Z-TIO module
(Slave)
Connection to the RS-232C port of the host computer (master)
Host computer (Master)
RS-485
Pair wire
Shielded twisted
pair wire
R
SG
T/R (B)
T/R (A)
Connected by
the internal
communication line
Module type controller SRZ
SG 5
R
T/R (A) 3
4
T/R (B)
RS-232C/RS-485 converter *
RS-232C
* When the host computer (master) uses
Windows95/98/Me/NT/2000/XP, use a
RS-232C/RS-485 converter with an
automatic send/receive transfer function.
Recommended RS-232C/RS-485 converter:
CD485, CD485/Vmanufactured by Data Link,
Inc. or equivalent
Up to 16 Z-TIO modules can be connected.
The maximum number of SRZ modules (including other function modules) on the same communication line is 31.
R: Termination resistor
(Example:
120
Ω 1/2 W)
SG 5
T/R (A) 3
4
T/R (B)
(
−)
(
+)
(
−)
(
+)
Z-TIO module
(Slave)
Z-TIO module
(Slave)
Connection to the USB of the host computer (master)
Host computer (Master)
RS-485
Pair wire
Shielded twisted
pair wire
Module type controller SRZ
Connected by
the internal
communication line
SG 5
T/R (A) 3
4
T/R (B)
USB communication
converter COM-K *
Connected to USB port
of a personal computer
USB cable
(COM-K
accessory)
Connected to
USB connector
5
1
SG
3
T/R(B)
2
T/R (A)
4
Unused
Up to 16 Z-TIO modules can be connected.
The maximum number of SRZ modules (including other function modules) on the same communication line is 31.
R: Termination resistor
(Example:
120
Ω 1/2 W)
* The termination resistor is built-in to
the COM-K.
SG 5
T/R (A) 3
4
T/R (B)
R
(
−)
(
+)
(
−)
(
+)
Z-TIO module
(Slave)
Z-TIO module
(Slave)
3. COMMUNICATION REQUIREMENTS
Processing times during data send/receive
When the host computer is using either the polling or selecting procedure for communication,
the following processing times are required for controller to send data:
- Response wait time after controller sends BCC in polling procedure
- Response wait time after controller sends ACK or NAK in selecting procedure
RKC communication (Polling procedure)
Procedure details
Time
Response send time after controller receives ENQ
50 ms max.
Response send time after controller receives ACK
50 ms max.
Response send time after controller receives NAK
50 ms max.
Response send time after controller sends BCC
2 ms max.
RKC communication (Selecting procedure)
Procedure details
Time
Response send time after controller receives BCC
50 ms max.
Response wait time after controller sends ACK
2 ms max.
Response wait time after controller sends NAK
2 ms max.
Modbus
Procedure details
Time
Read holding registers [03H]
Response send time after the slave receives the query message
50 ms max.
Preset single register [06H]
Response send time after the slave receives the query message
30 ms max.
Diagnostics (loopback test) [08H]
Response send time after the slave receives the query message
30 ms max.
Preset multiple registers [10H]
Response send time after the slave receives the query message
100 ms max.
RS-485 (2-wire system) send/receive timing
RS-485 communication is conducted through two wires, therefore the transmission and
reception of data requires precise timing.
Polling procedure
a: Response send time after the controller receives [ENQ] + Interval time
b: Response send time after the controller sends BCC
c: Response send time after the controller receives [ACK] + Interval time or
Response send time after the controller receives [NAK] + Interval time
- - - - -
or
Host
computer
b
c
a
- - - - -
N
A
K
A
C
K
E
N
Q
S
T
X
B
C
C
E
O
T
SRZ
Send data
(Possible/Impossible)
Possible
Impossible
Sending status
Send data
(Possible/Impossible)
Possible
Impossible
Sending status
Selecting procedure
a: Response send time after the controller receives BCC + Interval time
b: Response wait time after the controller sends ACK or Response wait time after the controller sends NAK
b
a
- - - - -
S
T
X
B
C
C
or
N
A
K
A
C
K
Host
computer
SRZ
Send data
(Possible/Impossible)
Possible
Impossible
Sending status
Send data
(Possible/Impossible)
Possible
Impossible
Sending status
To switch the host computer from transmission to reception, send data must be on
line.
The following processing times are requires for the controller to process data.
- In Polling procedure, Response wait time after the controller sends BCC
- In Selecting procedure, Response wait time after the controller sends ACK or NAK
Fail-safe
A transmission error may occur with the transmission line disconnected, shorted or set to the
high-impedance state. In order to prevent the above error, it is recommended that the
fail-safe function be provided on the receiver side of the host computer. The fail-safe function
can prevent a framing error from its occurrence by making the receiver output stable to the
MARK (1) when the transmission line is in the high-impedance state.
Modbus data processing precautions
• Data with decimal point is treated as data without decimal point on the Modbus protocol.
• With Modbus protocol, the maximum number of channels per slave address is 4.
• Do not write data to any address which is not described in a list of data maps.
• If data range or address error occurs during data writing, the data written before error is in
effect.
• When communication data is sent to the controller that does not correctly match the
connected module or selected functions on the modules, the data will be invalid. If the
data is within a setting range, no error message is sent from the controller. The read data
is “0”.
• Send the next command message at time intervals of 24
bits after the master receives the
response message.
4. HOST COMMUNICATION DATA MAP
Explanation of items shown in the communication data maps are as follows.
• Modbus register address (HEX: Hexadecimal DEC: Decimal)
For a 4CH type, follow the chart exactly. For the 2CH type, the register
addresses for Channel 3 and 4 are unused. For communication parameters for
heat/cool control, the register addresses for Channel 2 and 4 are unused.
Example: The register addresses of 0092 (HEX) to 0095 (HEX)
CH#
Address
･
･
･
CH1 0092
CH2 0093
(This address is unused with heat/cool control.)
CH3 0094
(This address is unused with 2CH type.)
CH4 0095
(This address is unused with heat/cool control or 2CH type.)
･
･
･
• Digits
The number of communication data digits in RKC communication
• Attribute
RO: Read only data
(Host computer The
controller)
R/W: Read and Write data (Host computer
The controller)
• Data
Most significant
digit
Least significant
digit
……
b15
b0
…………….……………………
RKC communication
ASCII code data (Example: 7 digits)
Modbus
16-bit data
Symbols used in MAP
♣: Parameters only used for heat/cool control or position proportioning control,
therefore data for CH2 and CH4 are unused.
: Parameters which can be used in multi-memory area function.
♦: Data for each module
♠: Data for each channel
For details on the data, see the SRZ Instruction Manual (IMS01T04-E ).
Communication data (RKC communication/Modbus)
Modbus
register address
Name
RKC
Iden-
tifier
HEX DEC
Digits
Attri-
bute
Data range
Factory
set value
Model code
♦
ID
32
RO Model code (character)
ROM version
♦
VR
8 RO ROM version
Measured value
(PV)
♠
M1 0000
･
･
･
0003
0
･
･
･
3
7
RO Input scale low to
Input scale high
Comprehensive
event state
♠
AJ 0004
･
･
･
0007
4
･
･
･
7
7 RO RKC
communication
Least significant digit to 4th digit:
Event 1 state
to Event 4 state
5th digit: Heater break alarm
state
6th digit: Temperature rise
completion
7th digit: Burnout
Data
0: OFF 1: ON
Modbus
b0 to b3: Event 1 state
to Event 4 state
b4:
Heater break alarm
state
b5: Temperature
rise
completion
b6: Burnout
b7 to b15: Unused
Data
0: OFF 1: ON
[Decimal number: 0 to 127]
Operation mode
state monitor
♠
L0 0008
･
･
･
000B
8
･
･
･
11
7 RO RKC communication
Least significant digit:
Control
STOP
2nd digit: Control RUN
3rd digit: Manual mode
4th digit: Remote mode
5th digit to Most significant digit:
Unused
Data
0: OFF 1: ON
Modbus
b0: Control
STOP
b1: Control
RUN
b2: Manual
mode
b3: Remote
mode
b4 to b15: Unused
Data
0: OFF 1: ON
[Decimal number: 0 to 15]
Error code
♦
ER 000C 12 7 RO RKC communication
1: Adjustment data error
2: Data back-up error
4: A/D
conversion
error
32: Logic output data error
Modbus
b0: Adjustment data error
b1: Data back-up error
b2: A/D conversion error
b3: Unused
b4: Unused
b5: Logic output data error
b6 to b15: Unused
Data
0: OFF 1: ON
[Decimal number: 0 to 63]
(Continued on the next page )
3
4
5
(Base)
Communication terminals (RS-485)
3
4
5
Terminal No.
Send data/Receive data
Send data/Receive data
Signal ground
Signal name
T/R (A)
T/R (B)
SG
Symbol
CAUTION
To prevent electric shock or instrument failure, turn off the
power before connecting or disconnecting the instrument and
peripheral equipment.
!
WARNING
All Rights Reserved, Copyright
2006, RKC INSTRUMENT INC.
Z-TIO
Host Communication
Quick Instruction
Manual
Temperature Control Module
[for Host Communication]