Hioki 3169-20 User manual

RS-232C
INSTRUCTION MANUAL
For 3169-20/21

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Contents
Contents
Introduction.................................................................................1
Safety Notes...............................................................................1
Chapter 1 Specification ______________________ 3
Chapter 2 Details on Interface RS-232C _________ 5
2.1 Communication Methods .............................................5
2.1.1 Message Format .............................................................6
2.1.2 Output Queue and Input Buffer .....................................10
2.1.3 Setting Command .........................................................11
2.2 Flow Control ...............................................................12
Chapter 3 Command Function________________ 15
3.1 Command Reference .................................................15
3.1.1 Command Reference Format ........................................16
3.2 Command List ............................................................65
3.2.1 Command List ...............................................................65
3.2.2 Command Hierarchical Structure ..................................70
3.2.3 Enabled Commands by Status ......................................72
3.2.4 Initialization Item List .....................................................75
3.2.5 RS-232C Troubleshooting .............................................76

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Contents

1
Introduction
This instruction manual provides details of the RS-232C communica-
tions interface for the 3169-20/21 CLAMP ON POWER HiTESTER.
For the specifications of the RS-232C and connection with a PC, see
Chapter 9 "Using the Instrument with a Computer" (145 page), of the
instruction manual.
Safety Notes
This manual contains information and warnings essential for safe
operation of the product and for maintaining it in safe operating condi-
tion. Before using the product, be sure to carefully read the following
safety notes.
Safety Symbols
The following symbols in this manual indicate the relative importance
of cautions and warnings.
To connect the 3169-20/21 to a PC, use the optional 9612 RS-232C
CABLE.
Indicates that incorrect operation presents an
extreme hazard that could result in serious injury or
death to the user.
Indicates that incorrect operation presents a signifi-
cant hazard that could result in serious injury or
death to the user.
Indicates that incorrect operation presents a possibil-
ity of injury to the user or damage to the product.
Advisory items related to performance or correct
operation of the product.

2

3
Transfer Method
Connector Specifications
Specification Chapter 1
Transfer method Full duplex
Synchronous method Asynchronous communication method
Baud rate 2400/ 9600/ 19200/ 38400 bps
Data length 8 bits
Parity check None
Stop bit 1
Message Terminators
(Delimiter)
CR+LF, CR
Flow control None, XON/XOFF, RTS/CTS
Pin Functions CCITT EIA JIS Signal
Name Pin
Circuit No. Code Addr. Code Addr.
2Receive Data 104 BB RD RxD 2
3Send Data 103 BA SD TxD 3
5Signal Ground 102 AB SG GND 5
7Request to Send 105 CA RS RTS 7
8Clear to Send 106 CB CS CTS 8

4

Communication Methods
5
Various messages are supported in order to control the 3169-20/21
through the interface.
Messages are divided into program messages, which are sent to the
3169-20/21 from the PC, and response messages, which are sent to
the PC from the 3169-20/21.
The message system has the following hierarchy.
Details on Interface
RS-232C Chapter 2
2.1 Communication Methods
3169-20/21
Program messages
Response messages
PC
Program messages
Response messages
Answer messages
Messages
Command messages
Query messages

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Communication Methods
2.1.1 Message Format
Program Message Program messages can be divided into either command messages or
query messages.
• Command Message
Orders for controls of the unit, such as for making measurement condition
settings or for reset or the like.
(example)
Command message which sets the frequency
:FREQUENCY 60
• Query Message
Orders for responses relating to results of operation, results of measure-
ment, or the state of device settings.
(example)
Queries the current frequency
:FREQUENCY?
Response
messages
After a query message has been received, a response message is
produced the moment that its syntax has been checked.
Whether or not headers are prefixed to response messages is set by
the HEADer command.
The response-message unit parameter can be changed from a semi-
colon (;) to a comma (,) using the :TRANsmit:SEParator com-
mand. The parameter is set to a semicolon (;) by default.
Header ON
U1_INST[V] +101.25E+0;I1_INST[A]_1 +50.246E+0
Header OFF +101.25E+0;+50.246E+0
Answer Message An answer message is a character string created after one line of data
(up to the terminator) from a PC has been analyzed and processed.
This string is returned to the PC. Using this data, the 3169-20/21 is
synchronized with the PC.
Header portion Space Data portion
Header portion Question mark