We refurbish various tube benders and end formers. Quite often they have a PLC output which, if the machine is idle with the hydraulic pump running but no motion happening, will switch off after a time and shut down the hydraulic pump. My boss was wondering if there was any sort of standard for what this idle time delay should be. We see various times on different machines, typically in the 2 to 15 minutes range. Does anyone have any insight?