On the cascade primary controller, if there is no secondary SP information, when you switch from AUTO to cascade on the cascade secondary controller, the secondary settings change abruptly, so control is interrupted. To avoid this, in advance, send the SP value on the secondary controller to the primary controller, and have it do tracking.To do that, remote input is needed on the cascade primary controller as well.
Related Products & Solutions
-
Advanced Application UT75A
The UT75A temperature controllers employ an easy-to-read, 14-segment large color LCD display, along with navigation keys, thus greatly increasing the monitoring and operating capabilities. A ladder sequence function is included as standard. The short depth of the controller helps save instrument panel space. The UT75A also support open networks such as Ethernet communication.
-
Mid-level UT55A/UT52A
Increase monitoring and operating capabilities
-
UP55A
The UP55A is a newly-released 1/4 DIN sized program controller provides up to 30 program patterns, and simultaneous monitoring of 8 PV events, 16 time events, and 8 alarms. Also a ladder sequence function is included as standard.