Description

The cryogenic control software for the GeN target runs on an VME-based MVE162-232 input-output computer (IOC) located in the Hall, on the target platform. The computer name is VMEC4 (129.57.168.104). The operating system for the IOC is VxWorks, and the EPICS software must be loaded onto the IOC each time it is rebooted. This is an automatic process, and is performed from the JLab Accelerator server, OPServ. The boot directory is /cs/op/iocs/vmec4. Additional information can be found online at http://devweb.acc.jlab.org/internal/llapps/hcptarg/0.html.

Most of the data acquisition and communication is performed with the use of several GreenSpring Industry Packs (IPs) mounted on the IOC board itself, or on an IP carrier board (see table below). The JT valves are controlled by a JLab constructed VME card, labelled ``IO-Flex''.

Slot	Board	Industry Pack	Description
1	IOC	IP-ADIO #1	Analog & Digital Input-Output
		IP-ADIO #2	Analog & Digital Input-Output
2	IP-Carrier	IP-Octal	8 channel RS-232 communication
		IP-Stepper #1	2 channel step motor control
		IP-Stepper #2	2 channel step motor control
3	VMIc232	na	32 channel 5 Volt relay board
4	IO-Flex	na	4 channel JT valve controller