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Response time
The controllers GD-C1 and GD-C2 automatically select the most suitable signal processing method, according to the material and thickness of
the sensing object. Depending on the selected signal processing method, the response time is also automatically determined as either '5ms or
less', or '30ms or less'.
Further, when controller GD-C3 is used, the response time is 5ms or less.
The response time of the controllers, GD-C1 and GD-C2, can be confirmed by the following procedure.
Press '0-ADJ. key' in RUN mode'.
The channel display shows an alphanumeric character that represents the re-
sponse time in the right.
ALL-LOCK function
All keys on the operation panel are locked when the channel shift key is pressed for 3 sec. or more (unless CH-SELECT is set on 'PANEL').
To release the lock, press the channel shift key for 3 sec., or more, again.
7
RS-232C DATA TRANSMISSION (GD-C2 only)
GD-C2 can feed in the set level data into a PC or PLC memory using RS-232C serial communication and retrieve it whenever required.
In this case, the taught data should be stored in the prescribed channel.
Transmission specifications
Baud rate: Selectable from 300, 600, 1,200, 2,400, 4,800, 9,600, 19,200, or 31,250 bits/sec.
Format: Data bits ...................
Parity check ..............
Stop bits ....................
Terminal code ...........
Parameter setting
Set the paraments with the DIP switches on GD-C2.
Prameter DIP switch
1
2
3
4
5
6
7
8
ON
Terminal code
Stop bits
Parity Even / Odd
Parity None / Enable
Data bits
Baud rate
Note: Make sure to turn the power off when set the parameter DIP switch. When turn the power on, the set contents are reflected.
After setting, be sure to mount the protective cover.
Command
All commands used to communicate with GD-C2 are classified into three groups: write command, read command, and others (ASCII coded data
communication).
If the sent command is ineffective, GD-C2 returns 'Not Available'.
All characters including send and response statements are based on ASCII code.
Write command
Syntax: Statement + Numerical data + CR (ETX)
<Type of commands>
Statement
Write the date into the channel presently designated.
SCH
SCH
Space or
comma (, )
Process No. (Note 1)
Assign the channel and write data into it.
SRC 1 to 8
The command format is the same as for SCH.
Write the data into all channels.
SAC
SAC
Channel 1
Channel 8
After the write command is sent, Statement + CR(ETX) is returned
by GD-C2 to confirm the communication.
Notes: 1)
The GD series automatically selects the most effective sensing process
according to the material and thickness of the object.
The process number ranges from '00 to 47' in decimal number system.
2)
Both the one-sheet level data and the two-sheet level data are repre-
sented by decimal numbers from '0 to 4,095',
3)
The data information, information on the presence of data, the sensing
mode, etc., is represented by decimal numbers from '00 to 63'.
7 bits or 8 bits
None or Enable
Even or Odd
1 bit or 2 bits
CR or ETX
Usage
+ CR (ETX)
Attribute (Note 3)
Two-sheet level data (Note 2)
One-sheet level data (Note 2)
Channel 2
+ CR (ETX)
or
Switch
Parameter
No.
Bits/sec.
1
Switch No.
1
2
Baud rate
2
3
3
4
Data bits
5
Parity check
6
7
Stop bits
8
Terminal code
Read command
Syntax: Statement + CR (ETX)
<Type of commands>
Statement
Read the data of the presently designated channel.
Send: RCH + CR (ETX)
RCH
Response: RCH
Assign the channel and read its data.
Send: RRC 1 to 8 + CR (ETX)
RRC 1 to 8
Response: RRC 1 to 8
Read data of all channels.
Send: RAC + CR (ETX)
Response: RAC
RAC
Read only the sensing level data of the present channel.
Send: RAD + CR (ETX)
RAD
Response: RAD
Read the present sensing condition.
Send: OUT 0 + CR (ETX)
OUT 0
Response: OUT 0
Read the present sensing level (the number of LEDs which light up).
Send: OUT 1 + CR (ETX)
OUT 1
Response: OUT 1
Note: Both the one-sheet level data and the two-sheet level data are represented
by decimal numbers from '0 to 4,095',
Other than
5ms or less
the above
ON
OFF
300
600 1,200 2,400 4,800 9,600 19,200 31,250
ON
OFF
ON
OFF
ON
OFF
ON
ON
OFF OFF
ON
ON
ON
ON
ON
ON
OFF OFF OFF OFF
7 bits
8 bits
Enable
None
Even
Odd
1 bit
2 bits
CR
ETX
Usage
CR (ETX)
CR (ETX)
Channel 1
Channel 2
Channel 8
+ CR (ETX)
Sensing level data (Note)
+ CR (ETX)
Sensing condition
(0: Zero-sheet sensing, 1: One-sheet sensing, 2: Two-sheet sensing)
+ CR (ETX)
Sensing level
(0 to 7)
30ms or less
ON
OFF
OFF OFF
CR (ETX)
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