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Showing results for tags 'LIMIT'.
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On upgrading my Unilogic program with compiler version 1.29.111, it now reports this error: 'The TCP Remote slave limit of 64 operations has be (sic) reached. (136)' The program previously compiled successfully with compiler version 1.29.26 and .34. I have 11 ModBus Remote Slaves on separate IP addresses, with 10 of which I request a single 64-register transfer, and the eleventh two 32-bit register transfers. If I remove all the Slaves and associated code, then the program compiles. If I then reinstate them it now compiles successfully! I have several versions of my program in development, chasing different operational problems. Do I have to repeat this procedure for each of them in order to use this latest compiler? Regards Robin Proctor
Hi Guys, I was thinking that it will be very useful to have min and max value limit entries option for the timer Preset entry for Vision series. In the following star-delta motor starting example, i use T1 as a delay in order to make sure that star contactor will be de-energised before delta contactor is energized. Even though i use electrical interlock circuitry to prevent short-circuit, i always prefer to provide also an electronic safety. Since response time of the PLC outputs is much faster than the response time of the contactor coils, T1 delay is required. Today i had a call from one of my customers saying that there is something wrong with the motor of his air pressure booster which is controlled by a V130. The problem was that someone changed T1 preset value from 00:10 to 10:00 by mistake (10sec instead of 100mS). Just a practical example of a problem in the real world!