is +0.006° at -200°C and -0.006° at +850°C. The input must be the ratio Rs/Ro, where Rs is the RTD resistance and Ro the resistance of the RTD at 0°C (Sections 7.9 and 7.10).

PARAM.

DATA

 

NUMBER

TYPE

DESCRIPTION

01:

2

Repetitions

02:

4

Input location of Rs/Ro

03:

4

Input location of result

04:

FP

Multiplier

05:

FP

Offset

Input locations altered: 1 for each RTD

*** 17 INTERNAL TEMPERATURE ***

FUNCTION

This instruction measures the temperature (°C) of a thermistor on the CR10 analog board. This temperature is generally not adequate for use as the thermocouple reference temperature (Section 13.4).

PARAM.

DATA

 

NUMBER

TYPE

DESCRIPTION

01:

4

Input location number

 

 

for temperature

Input locations altered:

1

*** 18 MOVE TIME TO INPUT LOCATION ***

FUNCTION

This instruction takes the current time in seconds into the minute, minutes into the day, or hours into the year and does a modulo divide (see Instruction 46) on the time value with the number specified in the second parameter. The result is stored in the specified input location. Entering 0 or a number which is greater than the maximum value of the time for the second parameter will result in the actual time value being stored.

 

PARAMETER 1 CODES

Code

Time Units

0Seconds into minute (maximum 60)

1Minutes into current day (maximum 1440)

2Hours into current year (maximum 8784)

SECTION 9. INPUT/OUTPUT INSTRUCTIONS

PARAM.

DATA

 

NUMBER

TYPE

DESCRIPTION

01:

2

Time Code

02:

4

Number to modulo

 

 

divide by

03:

4

Input location number

Input locations altered:

1

*** 19 MOVE SIGNATURE INTO INPUT ***LOCATION

FUNCTION

This instruction stores the signature of the Read Only Memory (ROM) and user program memory (RAM) into an input location. The signature is a result of the CR10 PROM, the size of RAM, and the entries in the *1, *2, *3, *A, and *C Modes. This signature is not the same as the signatures given in the *B Mode. Recording the signature allows detection of any program change or ROM failure.

PARAM

DATA

 

NUMBER

TYPE

DESCRIPTION

01:

4

Input location number

Input locations altered:

1

*** 20 PORT SET ***

FUNCTION

This instruction sets or configures specified control ports (C1-C8). On power-up, ports default to input configuration (i.e., they are not driven high or low by the CR10, and can be used to read the status of an external signal using Instruction 25). When a port is set high, low, pulsed, or toggled by this instruction or a program control command, the port is automatically configured as an output.

NOTE: Voltages in excess of 5.5 volts applied to a control port can cause the CR10 to malfunction.

Ports can also be set using the *6 Mode or the J and K telecommunications commands. However, the ports MUST be configured as outputs before these means of setting them will work. The option to configure the port as an output is used when a port must be configured as an output without changing the state of the port.

9-9