WIKA CS4R - Manual (Page 27)

Operating Instructions Temperature Indicating Controller CS4R
V1.2 • 05/2006 - 27 -
[Self diagnosis]
The CPU is monitored by a watchdog timer, and when any abnormal status is found on the CPU, the
controller is switched to warm-up status with all outputs turned off.
[Automatic cold junction temperature compensation] (Only thermocouple input)
This detects the temperature at the connection terminal between the thermocouple and the
instrument and always keeps it on the same status as when the reference junction is located at
0°C (32°F).
[Power failure countermeasure]
The setting data is backed up in non-volatile IC memory.
10.2 Optional specifications
Heater burnout alarm (Option code: [W1x])
Watches the heater current with CT (Current transformer) and detects the burnout.
When this option is added, this option shares common output with Alarm and Loop break alarm.
This option cannot be applied to DC current output type.
Rating
: 5A [W10], 10A [W11)], 20A [W12], 50A [W15] (Must be specified)
Setting range : 5A [W10], 0.0 … 5.0A (Off when set to 0.0)
10A [W11], 0.0 … 10.0A (Off when set to 0.0)
20A [W12], 0.0 … 20.0A (Off when set to 0.0)
50A [W15], 0.0 … 50.0A (Off when set to 0.0)
Setting accuracy : ±5% of the rated value
Action
: ON/OFF action
Output : Open collector
Control capacity 24V DC 0.1A (max.)
Digital interface (Option code: [5])
The following operations are performed from external computer.
(1) Reading and setting of the main setting value, PID and other various setting values
(2) Reading of the input value and action status
(3) Function change
Communication interface : Based on EIA RS-485
Communication method : Half-duplex communication start-stop synchronous
Data transfer rate : 2400/4800/9600/19200bps (Selectable by key operation)
Parity : Even/Odd/No (Selectable by key operation)
Stop bit : 1 or 2 (Selectable by key operation)
Communication protocol : WIKA/Modbus RTU/Modbus ASCII (Selectable by key operation)
Number of connectable units : A maximum of 31 units per host computer
Communication error detection : Dual detection by the parity and checksum
Digital external setting
: SV of programmable controller (with option SVTC) can be transmitted
digitally to the CS4R (with option serial Interface [5]) by combining the
programmable controller with the CS4R.
[Setting value Lock of the CS4R must be set to Lock 3.]
When data from the programmable controller is greater than SV high
limit or smaller than SV low limit, CS4R ignores the value and controls
with the former value.
Control desired value is the value that is added SVTC bias value to
the received value by SVTC command.