Panasonic FP2 Series User manual

Safety Precautions
Observe the following notices to ensure personal safety or to prevent accidents.
To ensure that you use this product correctly, read this User’s Manual thoroughly before use.
Make sure that you fully understand the product and information on safety.
This manual uses two safety flags to indicate different levels of danger.
WARNING
If critical situations that could lead to user’s death or serious injury is assumed by
mishandling of the product.
-Always take precautions to ensure the overall safety of your system, so that the whole system
remains safe in the event of failure of this product or other external factor.
-Do not use this product in areas with inflammable gas. It could lead to an explosion.
-Exposing this product to excessive heat or open flames could cause damage to the lithium battery
or other electronic parts.
CAUTION
If critical situations that could lead to user’s injury or only property damage is assumed
by mishandling of the product.
-To prevent excessive exothermic heat or smoke generation, use this product at the values less than
the maximum of the characteristics and performance that are assured in these specifications.
-Do not dismantle or remodel the product. It could cause excessive exothermic heat or smoke
generation.
-Do not touch the terminal while turning on electricity. It could lead to an electric shock.
-Use the external devices to function the emergency stop and interlock circuit.
-Connect the wires or connectors securely.
The loose connection could cause excessive exothermic heat or smoke generation.
-Do not allow foreign matters such as liquid, flammable materials, metals to go into the inside of the
product. It could cause excessive exothermic heat or smoke generation.
-Do not undertake construction (such as connection and disconnection) while the power supply is on.
It could lead to an electric shock.
Copyright / Trademarks
-This manual and its contents are copyrighted.
-You may not copy this manual,in whole or part,without written consent of PanasonicElectric
Works.,Ltd.
-Windows and Windows NT are registered trademarks of Microsoft Corporation in the
United States and/or other countries.
-All other company names and product names are trademarks or registered
trademarks of their respective owners.
-Matsushita Electric Works,Ltd. pursues a policy of continuous improvement of the
Design and performance of its products, therefore,we reserve the right to change the manual/
product without notice.
BNTN

i
Table of Contents
Precautions Concerning Compatibility with the FP3 v...........
Transmission Speed and Transmission Format vii................
Flow Control xiii.........................................................
Chapter 1 Functions of Serial Data Unit
1.1 Features and Parts Number of Serial Data Unit 1 −3........................
1.1.1 Features 1 −3.................................................
1.1.2 Part Number of Unit 1 −3........................................
1.2 Function of Serial Data Unit 1 −4........................................
1.3 Restrictions on Units Combination 1 −5...................................
1.3.1 Restrictions on Current Consumption 1 −5........................
1.3.2 Restrictions on Unit Installation Position 1 −5......................
Chapter 2 Parts and Functions
2.1 Parts and Functions 2 −3...............................................
2.1.1 Name of Parts 2 −3............................................
2.1.2 Operation Status Display LEDs 2 −4..............................
2.1.3 COM.1 and COM.2 Ports (9 pins) 2 −5............................
2.1.4 Transmission Format Setting Switch 2 −5.........................
Chapter 3 Confirming the Unit Settings and Design Contents
3.1 Signals of RS232C Connector 3 −3......................................
3.2 Setting the Transmission Speed and Transmission Format 3 −5..............
3.2.1 Transmission Format Settings Set Using Switches 3 −6.............
3.2.2 Transmission Format Settings Using the Shared Memory 3 −6.......
3.3 Confirming the I/O Contacts and Slot Number 3 −10.......................
3.3.1 The Role of Input/Output Contacts 3 −10.........................
3.3.2 Allocation of I/O Contacts 3 −10.................................
3.3.3 Confirming the I/O Allocation and Slot Number 3 −11...............
3.3.3.1 Confirming the I/O Number Allocations 3 −11............
3.3.3.2 Confirming Slot Number 3 −12........................

FP2 Serial Data UnitTable of Contents
ii
Chapter 4 Communication with External Devices
4.1 Overview of Communication with External Devices 4 −3....................
4.1.1 Sending Data to External Devices 4 −3...........................
4.1.2 Receiving Data from External Device 4 −5.........................
4.2 Programming When Data is Sent 4 −7....................................
4.2.1 How Timings and Flags (Contacts) Work 4 −7.....................
4.3 Programming When Data is Received 4 −10..............................
4.3.1 How Timings and Flags (Contacts) Work 4 −10...................
4.4 Sample Program 4 −14................................................
4.4.1 Sample Program <FP series PLC (MEWNETCOL−COM)> 4 −14....
4.5 Data Sent and Received with the Serial Data Unit 4 −20...................
Chapter 5 Precautions Regarding Serial Data Unit Operation
and Programs
5.1 Precautions Regarding Basic Operation of the Unit 5 −3....................
5.1.1 Shared Memory Values When the Power Supply is Off 5 −3.........
5.2 Precautions Concerning Communication 5 −4.............................
5.2.1 Precautions When a Start Code is Valid 5 −4......................
5.2.2 End Codes for Communication 5 −5..............................
5.2.3 Operation If a Communication Error Occurs 5 −5...................
5.2.4 Precautions Concerning a Software Reset 5 −6....................
5.2.5 Precautions When Setting the Control Signals
CS and CD to “Valid” 5 −6.......................................
Chapter 6 Operation If an Error Occurs
6.1 Operation If an Error Occurs 6 −3........................................
6.1.1 If the ALARM LED on the Serial Data Unit Lights 6 −3..............
6.1.2 When the Serial Data Unit ERROR LED Lights 6 −4................
6.2 What To Do If An Error Occurs 6 −5......................................
6.2.1 If the ALARM LED Lights on the Serial Data Unit 6 −5..............
6.2.2 If the ERROR LED on the Serial Data Unit Lights 6 −5..............
6.2.3 If Data cannot be Sent or Received with the Serial Data Unit 6 −6....

Table of Contents
FP2 Serial Data Unit
iii
Chapter 7 Specifications
7.1 Tables of Performance Specifications 7 −3................................
7.2 Table of Shared Memory Areas 7 −5.....................................
7.3 Table of I/O Contacts 7 −6..............................................
7.4 Transmission Format 7 −8..............................................
Chapter 8 Sample Programs
8.1 Sample Programs 8 −3.................................................
8.1.1 Adding a BCC (block check code) 8 −3...........................
8.1.1.1 An Overview of the BCC 8 −3.........................
8.1.1.2 BCC Automatic Addition Sent Program 8 −5.............
8.1.1.3 Received Program with BCC Check 8 −7...............
8.1.2 Time Out and Retry 8 −9........................................
8.1.2.1 An Overview of the Time Out and Retry Functions 8 −9...
8.1.2.2 Time Out and Retry Program 8 −9.....................
8.2 Table of ASCII Codes 8 −11.............................................
Record of changes R−1..............................................

FP2 Serial Data UnitTable of Contents
iv

Precautions Concerning Compatibility with the FP3
FP2 Serial Data Unit
v
Precautions Concerning Compatibility with
the FP3
Hardware compatibility
Please be aware that the following items are different for the FP2 and FP3 Serial Data
Units.
The DIP switch settings are different.
With the FP2 Serial Data Unit, the contents that can be set with the DIP switches are
limited to the transmission speed and data length. The settings for the parity, stop bit
length, and the start code/end code, as well as the control signal CS / CD effective/valid
settings, are fixed in the initial status, but can be changed by writing different values to
the shared memory.
There is no external reset switch.
The FP2 Serial Data Unit has no reset switch.
Both are connected to serial devices in the same way.
The specifications for the RS232C interface on the FP2 Serial Data Unit are the same
as those of the FP3.
Software compatibility
The FP2 and FP3 Serial Data Units are compatible in terms of software.
Program operations are mostly the same.
With the FP2, operations such as I/O allocations, shared memory addresses, and
access to reading and writing data are the same as with the FP3. Most of the programs
can be used on both models.
next page

FP2 Serial Data UnitPrecautions Concerning Compatibility with the FP3
vi
Comparison of FP2/FP3 Serial Data Unit Specifications
Item Setting FP2 FP3
Transmission
speed
19200 bps • •
spee
d
9600 bps • •
4800 bps • •
2400 bps *•
1200 bps *•
600 bps *•
300 bps *•
Data length 7 bits • •
8 bits • •
Parity None *•
Odd parity • •
Even parity *•
Stop bit 1 bit • •
2 bits *•
Control signal
CS/CD
Invalid • •
CS/CD
Valid *•
End code Any code *•
CR(0DH) • •
CR(0DH) and
LF (0AH)
*•
ETX (03H) *•
Start code Invalid • •
Valid *•
External reset switch No Yes
•: These items can be set in the default settings, or using the DIP switches.
*: With the FP2, these are items which can only be set using the shared memory.

Transmission Speed and Transmission Format
FP2 Serial Data Unit
vii
Transmission Speed and Transmission
Format
The transmission speed and transmission format are decided when serial communication
is carried out. These settings must match on the transmitting side and receiving side, and
consist of the following items.
Transmission speed
With serial communication, data is sent in bit units, in sequential order, through a single
signal line. The transmission speed indicates the number of bits sent per second, and
is normally called the ”baud rate”.
FP2
External
device
The number of bits sent and received in one second is
expressed as the communication speed.
1 second
SDU
SD RD ERR SD RD ERR AL
COM.1COM.2
COM.1(RS232C)
COM.2(RS232C)
With the serial data unit, the following transmission speeds can be selected: “300 bps”,
“600 bps”, “1200 bps”, “2400 bps”, “4800 bps”, “9600 bps”, and “19200 bps”.
Data length (Character bit)
With serial communication, data (characters) are broken down into “1” and “0” signals
and transmitted. The “data length” specifies the number of bits used to represent one
character in this process.
1
One data element of 7 bits
010001 10100010
Data length 7 bits Data length 8 bits
One data element of 8 bits
With the serial data unit, either “7 bits” or “8 bits” may be selected as the data length.

FP2 Serial Data UnitTransmission Speed and Transmission Format
viii
Start bit and Stop bit
With normal communication, it is rare for a data transmission to consist of a single data
element (character). Usually, characters of a certain unit are sent in succession. With
serial communication, one “0” bit is always inserted before each data element, to
separate the various data elements being transmitted, and a “1” is added at the end of
each data element, for the same purpose. The “0” inserted before the data is called a
“start bit” and the “1” added at the end of the data is called a “stop bit”.
1
Start bit “0”
0100010
One data element (character)
01
Stop bit “1”
1
Start bit “0”
0100010
One data element (character)
011
Start bit “0”
0100010
One data element (character)
01
Stop bit “1” Stop bit “1”
With the serial data unit, the start bits and stop bits are inserted automatically.
Stop bit length
With serial communication, one bit is normally used for the stop bit, but if there is a lot
of noise on the communication circuit, or if the transmission speed fluctuates sharply,
two bits can be used as the stop bit, to differentiate one data element from the next more
clearly.
1
Start bit
0100010
One data element (character)
01
Stop bit
When the stop bit is 1 bit
1
Start bit
0100010
One data element (character)
011
Stop bit
(when 2 bits
are used)
When the stop bit is 2 bits
With the serial data unit, either “1 bit” or “2 bits” may be selected as the stop bit length.