Watlow F4T - Page 46

Watlow F4T Install & Troubleshooting • 43 • Chapter 6 Appendix
Number of Function Blocks by Ordering Option
Function Block Basic Set 1 Set 2
Alarm 6 8 14
Compare None 4 16
Counter None 4 16
Linearization 4 4 8
Logic None 12 24
Math None 12 24
Process Value 4 4 8
Special Output
Function
None 2 4
Timer None 6 16
Variable 4 12 24
Real Time Clock with Battery Backup
• Accuracy (typical): +/-3ppm over -15 to 50°C
• Typical battery life: 10 years at 77°F (25°C)
• Field replaceable lithium battery
Compare
• Greater than, less than, equal, not equal, greater than or equal, less than or equal
Counters
• Counts up or down, loads predetermined value on load signal
Linearization
• Interpolated or stepped
Logic
• And, nand, or, nor, equal, not equal, latch, ip-op
Math
• Average, process scale, switch over, deviation scale, differential (subtract), ratio
(divide), add, multiply, absolute difference, minimum, maximum, square root,
sample and hold, pressure-to-altitude and dew point
Process Value
• Sensor backup, average, crossover, wet bulb-dry bulb, switch over, differential
(subtract), ratio (divide), add, multiply, absolute difference, minimum, maximum, square
root, altitude, Vaisala
®
relative humidity and pressure-to-altitude
Special Output Function
• Compressor control (cool and/or dehumidify with single compressor), motorized valve,
sequencer
Timers
• On pulse, delay, one shot or retentive
Variable
• User value for digital or analog variable
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