Omega manual TTL to RS 232 adapter, Communication protocol from CL526 to a PC, Computer CL526

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	6	5	4
		8	3
	7		3
	1	2
	Front view

	LINDY	CINCH
pin 1 :	brown	black
pin 2 :	red	green
pin 3 :	green	blue
pin 4 :	gray	gray
pin 5 :	purple	yellow
pin 6 :	blue	white
pin 7 :	orange	red
pin 8 :	yellow	brown

10.3TTL to RS 232 adapter

The cat. BB530001 TTL to RS232 adaptor consists of a cable to which are connected a male mini DIN connector (for the CL526) and a DB 25 connector, that contains the electrical circuitry (for the PC).

The basic circuit and connections are as follows:

																										TTL to RS 232 converter
														+ 5 V
									10 µF, 16 V

10 µF, 16 V												+									10 µF, 16 V												IBM - PC
10 µF, 16 V																					10 µF, 16 V												IBM - PC
			+				6			2		16			10								CL526
							6			2		16			10																			D
																																		D
																												Tx						B
Tx																																	2
			11													14					Rx IBM											Rx	5
			11													14																	5

Rx			12													13					Tx IBM													3
Rx																					Tx IBM
																					Ground

																						IBM												2
			1							ICL 232																								7
																																		7
	+																								+ 5 V
10 µF, 16 V	+									TSC 232																		Mini-Din

3

4

+

10 µF, 16 V

5

158

10.4Communication protocol from CL526 to a PC

The exchange of information when a CL526 is interconnected with a PC are as follows:

COMPUTER REQUEST
Computer		CL526
Tx IDNAME	_	Rx IDNAME	Proceed if name acknoledged
Rx IDNAME	ß	Tx IDNAME	If not, do not answer
Tx Instruction	_	Rx Instruction
Rx Instruction	ß	Tx Instruction
Tx char	_	Rx char
Rx DATA 1	ß	Tx DATA 1
Tx char	_	Rx char
Rx DATA 2	ß	Tx DATA 2

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Contents CL526 OMEGAnetSM On-Line Service Internet e-mail Info@omega.com Introductory Note Table of Contents Digital Interface General Performance Specifications Power supply Battery lifeBattery voltage Dimensions 120x60x230 mm Weights net 1 KgTable of ranges and accuracy 32 to +302F ± 0.02% of rdg +0.18FGeneral Features Case Physical Description Power supply Functional Description+ 5 V for logic and analog circuits 5 V for analog circuits Input circuit Microprocessor FirmwareDigital display Digital to analog converterBattery charger. Operation from line source Resistance and Rtd measurementsResistance and Rtd simulation Thermocouples input-output circuitUnpacking PRE-OPERATIONAL Check Out 1248.3C TcWiring practice Electrical ConnectionsThermocouple wires Examples of input /output wiring and connectionsLimit of Error of thermocouple wires ClassPower Supply Battery ChargerHow to maximize the battery life Battery Line OpPower on Battery voltage indicationOperating mode set up Operation & ApplicationsOUT mode selection Parameter or sensor selection1032.2C TcK Out 0.0C TcKInternational Temperature Scale Rj modeTecnical unit Decimal point positionData memory configuration Average readingsIN-OUT data memories Data memory manual recall Data memory automatic scanningManual step advance Automatic simulation cycleSimulation cycle selection Time 0h 0m 50s Start 0.0mVEnd 100.0mV 0mVRj compensation mode check Simulation cycleMode Linear Mode Square Scale factor programRJ 0.0C ext ProgWord mbar Word psi Word hPaInstallation parameter procedure Firmware version code Serial numberExternal Rj compensation Digital interface data program mode Digital output wiring practiceDigital Interface Baud RateTTL to RS 232 adapter Communication protocol from CL526 to a PCComputer CL526 Instruct DataPage Ramp Computer request for CL526 settings = OHMInstr ModeDis/Lin STO 2 #D 127 202 Display Chksum = DATA1 + DATA2 + Data 3 + Data 4 .AND.7F Communication programs Example a data transfer from CL526 to PCExample B PC instructions to CL526 Example a3ØØ While LOC 1 = Ø Wend Maintenance Safety recommendationsFaulty operating conditions Error ChecksumProtection fuses StorageIndex WARRANTY/DISCLAIMER Temperature