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Theta Controller
4.1.3 Theta Controller Serial Connector
Theta Controllers have two male DB-9 connectors. The COM 2 serial connector is used when
connecting to a network, see section 2.8.2 Setup Menu: 2. Communications, or when using a
barcode scanner or printer. The COM 1 serial connector allows a connection to a laptop computer
for access to Embedded Toolbox Gateway software. The connection between the computer and the
controller is a simple null-modem cable. Only pins 2, 3 and 5 are active on this connector.
When the ASCII version of Theta controller firmware is installed the COM 2 functions are
Barcode/Printer. This will allow COM 2 to read a barcode as PART ID and print a fastening cycle
results string. This will only print after a fastening cycle occurs; see string below.
S01,JB01, 4.1,A,126.2,A,A,06/09/2008 10:20:19,
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| | overall status (A=OK, R=NOK)
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| angle status (A=OK, H=HIGH, L=LOW)
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angle result (last step ran or audit step whichever is smaller, fixed decimals)
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| torque status (A=OK, H=HIGH, L=LOW)
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torque result (last step ran or audit step whichever is smaller, decimals are tool/units dependant)
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job number
spindle number
The barcode input monitors inter-character timing. When there is a 500ms gap between characters,
a complete barcode is assumed. When received, the controller logs it as PART ID with all
fastening cycles until another barcode is received or until controller power is cycled. If the
incoming barcode is longer than 32 characters then the last 32 characters received is used.
4.1.4 Theta Controller Input and Output Connector
All four inputs and four outputs are optically isolated 24VDC. The Theta has an internal 24VDC
power supply that can be used to provide the I/O signals, an external 24VDC power supply may
be used instead. The following are the amperage ratings:
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Internal 24VDC supply: Maximum = 1 ampere total
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External 24VDC supply: Maximum = 1 ampere per output
The Theta controller's Input circuits conform to the IEC 61131-2 standard for PLCs.
Type
Rated
Of
Voltage
Limit
V low (v)
Max
5
24 volt
Min
-3
The Theta controller has a terminal block connector for error proofing. Error proofing in the Theta
controller is based on simple bolt counting with Poke-Yoke.
Theta Controller Connections
DB-9 Connector Pins
Pin
Function
2
Receive Data
3
Transmit Data
5
Signal Ground
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| | | second
| | minute
| hour
year
LIMITS per IEC 61131-2
Type 2 limits
State 0
I low (ma)
V trans (v)
30
11
ND
5
,
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barcode
(32 characters)
Transition
I trans (ma)
V high (v)
30
30
2
11
State 1
I high (ma)
30
6
47
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